How do you simplify 3 x + 1 x + 2 − − 5 x + 7 ?

1 Answer
May 4, 2018

=9x+9

Explanation:

We can add everything together. The variables for themselves and the integers for themselves.

3x+1x+2-(-5x)+7

4x+2-(-5x)+7

For -(-5x) you know that (-)*(-)=+. So, since it's written as -(-5x) it will be equal to 5x.

4x+2+7-(-5x)

4x+9+5x

We will then land on the answer,

=9x+9