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At the beginning of the week,
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Stewart's checking account had a balance
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of negative fifteen dollars and eight cents.
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On Monday morning he deposited a check
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for four hundred twenty-six dollars and ninety cents.
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On Tuesday morning he deposited another check
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for [one] hundred dollars.
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How much was in Stewart's checking account
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after the second deposit, so after both of these deposits right over here?
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So, he starts off with a negative balance,
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so a negative balance means
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that he's overdrawn his checking account.
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He actually owes the bank money now.
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Luckily, he's now going to put some money in his bank account,
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so he'll actually have a positive balance in his checking account.
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So, he starts off with negative fifteen dollars and eight cents,
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and then to that, he adds
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four hundred twenty-six dollars and ninety cents.
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And then he adds another hundred dollars.
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So, he started off with negative fifteen dollars and eight cents,
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and then to that, he adds four hundred twenty-six dollars
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and ninety cents and a hundred dollars.
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So, that's five hundred and twenty-six dollars and ninety cents.
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And so, how much is he going to have in his bank account?
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He started, owing fifteen dollars and eight cents,
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and then he's going to add
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five hundred twenty-six dollars and ninety cents.
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So, one way to visualize it,
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is if you think about it on the number line,
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and this is zero right over here.
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He starts off at negative fifteen-point-zero-eight,
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but then he's going to add
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five hundred and twenty-six dollars [and ninety cents].
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This is fifteen-point-zero-eight to the left,
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that's how much he owes,
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and to that, he's going to add
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five hundred and twenty-six [dollars and ninety cents].
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So, I'm not drawing this to scale,
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but to that he's going to add
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five hundred and twenty-six dollars and ninety cents.
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So, the amount that he's going to be in the positive
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is going to be
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five hundred twenty-six dollars and ninety cents,
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minus the fifteen-point-zero-eight.
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And, so, essentially it's going to be this length right over here,
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that's how much he's going to be in the positive,
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That's going to be five hundred twenty-six dollars and ninety cents,
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minus fifteen dollars and eight cents.
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So, that's going to be--
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and we can even just rewrite this
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so that it actually looks exactly like that.
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That's the exactly the same thing as
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five hundred twenty-six dollars and ninety cents,
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minus--
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minus--
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adding a negative is the same thing
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as subtracting a positive--
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minus fifteen-point-oh-eight.
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--I will do this in another color--
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Five hundred and twenty-six dollars and ninety cents,
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minus fifteen dollars and eight cents.
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Let's see, zero is less than eight,
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let's make that a ten and borrow from this nine,
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so that becomes an eight--
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or I guess you could say, we are regrouping--
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Everything up here is larger than everything there,
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so ten minus eight is two,
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eight minus zero is eight,
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we have our decimal.
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Six minus five is one.
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Two minus one is one,
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and then you have five minus nothing.
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So, he is left
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with five hundred eleven dollars and eighty-two cents,
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after his second deposit.