3+12=2s

Solution for 3+12=2s equation:

Simplifying
3 + 12 = 2s

Combine like terms: 3 + 12 = 15
15 = 2s

Solving
15 = 2s

Solving for variable 's'.

Move all terms containing s to the left, all other terms to the right.

Add '-2s' to each side of the equation.
15 + -2s = 2s + -2s

Combine like terms: 2s + -2s = 0
15 + -2s = 0

Add '-15' to each side of the equation.
15 + -15 + -2s = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2s = 0 + -15
-2s = 0 + -15

Combine like terms: 0 + -15 = -15
-2s = -15

Divide each side by '-2'.
s = 7.5

Simplifying
s = 7.5