Question

Which equation has solution x = -3?

A) 2x - 7 = -1
B) 3x + 8 = 1
C) 1/2 x + 8 = 10
D) 1/2 (2x - 6) = -6

Answer 1

A) 2(-3) - 7 = -1 B) 3(-3) + 8 = 1
-6 - 7 = -1 -9 + 8 = 1
-13 = -1 -1 = 1

C) 1/2(-3) + 8 = 10 D) 1/2 (2(-3) - 6) = -6
-1.5 + 8 = 10 1/2 ( -12) = -6
6.5 = 10 -6 = -6

D is the answer

Answer 2

if you put x = -3 in these options, only option D gets the required answer. So option D is correct.