15=3(m+1)

Solution for 15=3(m+1) equation:

Simplifying
15 = 3(m + 1)

Reorder the terms:
15 = 3(1 + m)
15 = (1 * 3 + m * 3)
15 = (3 + 3m)

Solving
15 = 3 + 3m

Solving for variable 'm'.

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

Add '-3m' to each side of the equation.
15 + -3m = 3 + 3m + -3m

Combine like terms: 3m + -3m = 0
15 + -3m = 3 + 0
15 + -3m = 3

Add '-15' to each side of the equation.
15 + -15 + -3m = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -3m = 3 + -15
-3m = 3 + -15

Combine like terms: 3 + -15 = -12
-3m = -12

Divide each side by '-3'.
m = 4

Simplifying
m = 4