-2(m+3)+m=78

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

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

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

Combine like terms: -2m + m = -1m
-6 + -1m = 78

Solving
-6 + -1m = 78

Solving for variable 'm'.

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

Add '6' to each side of the equation.
-6 + 6 + -1m = 78 + 6

Combine like terms: -6 + 6 = 0
0 + -1m = 78 + 6
-1m = 78 + 6

Combine like terms: 78 + 6 = 84
-1m = 84

Divide each side by '-1'.
m = -84

Simplifying
m = -84