Question

For which of the following is x = 5 NOT a solution

(a) 12 + 3x = -15
(b) 2x − 6x = -20
(c) 18 = 13 + x
(d) -4x = x − 25

Answer 1

the first one, if you plug in 5 to the others, they come out even. A does not.

12 + 3(5) = -15
12 + 15 = -15
27 = -15
0 = -42

this is incorrect, making A your answer.
hope this helps!

Answer 2

A) x= -9

B) x=5

C) x=5

D) x=5

Explanation: