Writing Expressions 1

Writing Expressions 1

What I want to do in this video is write the algebraic expressions

that represent the same thing that these statements are saying.

So this first statement, they say "The sum of -7 and the quantity 8 times x,"

So the sum, the sum...so we're going to have an addition here...of -7...

of -7...

...and the quantity 8 times x...

...so the quantity 8 times x. Well that's just 8x...

(So I can just write 8x over there)

So it is -7+8x,

or you could view this as the sum of -7 and the quantity 8 times x.

Let's do the next one!

Take the quantity -3 times x,

so take the quantity -3 times x,

and then add 1...and then add 1...

So the quantity -3 times x, we can write that as -3x,

and then we need to add 1 to that.

So that's going to be plus...plus 1.

Now this one: -6 plus...-6 plus...

so we can write -6 plus something

The product of -1 and x.

So the product of -1 and x...that's just going to be -1x.

-1x which is the same thing as -x.

So we can write this as -6 plus -x, or we can just write this...

this is the exact same thing as

-6-x.

And we are done!