-78=2(m+3)+m

Solution for -78=2(m+3)+m equation:

Simplifying
-78 = 2(m + 3) + m

Reorder the terms:
-78 = 2(3 + m) + m
-78 = (3 * 2 + m * 2) + m
-78 = (6 + 2m) + m

Combine like terms: 2m + m = 3m
-78 = 6 + 3m

Solving
-78 = 6 + 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.
-78 + -3m = 6 + 3m + -3m

Combine like terms: 3m + -3m = 0
-78 + -3m = 6 + 0
-78 + -3m = 6

Add '78' to each side of the equation.
-78 + 78 + -3m = 6 + 78

Combine like terms: -78 + 78 = 0
0 + -3m = 6 + 78
-3m = 6 + 78

Combine like terms: 6 + 78 = 84
-3m = 84

Divide each side by '-3'.
m = -28

Simplifying
m = -28