m+(3+m)-2=78

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

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

Remove parenthesis around (3 + m)
m + 3 + m + -2 = 78

Reorder the terms:
3 + -2 + m + m = 78

Combine like terms: 3 + -2 = 1
1 + m + m = 78

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

Solving
1 + 2m = 78

Solving for variable 'm'.

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

Add '-1' to each side of the equation.
1 + -1 + 2m = 78 + -1

Combine like terms: 1 + -1 = 0
0 + 2m = 78 + -1
2m = 78 + -1

Combine like terms: 78 + -1 = 77
2m = 77

Divide each side by '2'.
m = 38.5

Simplifying
m = 38.5