Question

If 2x + 7 = -21, what does 2 - x equal?

Answer 1

12.5

Explanation:

2x+7=-21

2x+7-7=-21-7

2x=-28

2x/2=-28/2

x=-14

2-x=?

2-(-14)

2+14=16

Hope this helped!

Answer 2

16

Explanation:

First, we solve for x.

`2x+7=-21\\2x=-28\\x=-14`

We now evaluate 2-x, plugging in -14 for x.

`2-x\\2-(-14)\\2+14\\16`