Question

Solve this equation: 2s + s + 12 = 132.

A. s = 40
B. s = 120
C. s = 9
D. s = –30

Answer 1

2s+ s+ 12= 132
⇒ (2s+ s)+ 12= 132 (combine like terms)
⇒ 3s+ 12= 132
⇒ 3s= 132 -12 (inverse operation)
⇒ 3s= 120
⇒ s= 120/3
⇒ s= 40

Final answer: A. s= 40.

Answer 2

If you would like to solve the equation 2 * s + s + 12 = 132, you can do this using the following steps:

2 * s + s + 12 = 132
3 * s = 132 - 12
3 * s = 120 /3
s = 120/3
s = 40

The correct result would be A. s = 40.