How do you solve the equation 2s + s + 12=132?

Apr 10, 2016

$40$

Explanation:

$2 s + s + 12 = 132$

Unknowns on one side, known terms on the other.

$3 s = 132 - 12$

$3 s = 120$

$s = \frac{120}{3}$

$s = 40$