78=(m+3)+m

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

Simplifying
78 = (m + 3) + m

Reorder the terms:
78 = (3 + m) + m

Remove parenthesis around (3 + m)
78 = 3 + m + m

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

Solving
78 = 3 + 2m

Solving for variable 'm'.

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

Add '-2m' to each side of the equation.
78 + -2m = 3 + 2m + -2m

Combine like terms: 2m + -2m = 0
78 + -2m = 3 + 0
78 + -2m = 3

Add '-78' to each side of the equation.
78 + -78 + -2m = 3 + -78

Combine like terms: 78 + -78 = 0
0 + -2m = 3 + -78
-2m = 3 + -78

Combine like terms: 3 + -78 = -75
-2m = -75

Divide each side by '-2'.
m = 37.5

Simplifying
m = 37.5