Question

What is the unknown factor that makes each of the following statements true?

5-х = ? (х-5)
b-k= ? (k-b)
– 3х +7 = ? (3х – 7)
A. -1/2
B. 1
C. -2
D.-1

Answer 1

-1 case D)

Explanation:

5-x=-(x-5) so the unknown factor is -1

b-k=-(k-b), again, -1

Similar for third case.