-21+15=m-5

Solution for -21+15=m-5 equation:

Simplifying
-21 + 15 = m + -5

Combine like terms: -21 + 15 = -6
-6 = m + -5

Reorder the terms:
-6 = -5 + m

Solving
-6 = -5 + m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
-6 + -1m = -5 + m + -1m

Combine like terms: m + -1m = 0
-6 + -1m = -5 + 0
-6 + -1m = -5

Add '6' to each side of the equation.
-6 + 6 + -1m = -5 + 6

Combine like terms: -6 + 6 = 0
0 + -1m = -5 + 6
-1m = -5 + 6

Combine like terms: -5 + 6 = 1
-1m = 1

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

Simplifying
m = -1