Question

What value of s makes the statement true? (–7 + s) + (–14) = (12 + (–7)) + (–14)

Answer 1

In order to find the answer we can add and subtract all the like terms together.

(-7+s)+(-14)=(12+(-7))+(-14)
(-7+s)+(-14)=(5)+(-14)
(-7+s)=5
s=12

So, the answer MUST be D.