-2m-5m-8m=3+(-7)+m

Solution for -2m-5m-8m=3+(-7)+m equation:

Simplifying
-2m + -5m + -8m = 3 + (-7) + m

Combine like terms: -2m + -5m = -7m
-7m + -8m = 3 + (-7) + m

Combine like terms: -7m + -8m = -15m
-15m = 3 + (-7) + m
-15m = 3 + -7 + m

Combine like terms: 3 + -7 = -4
-15m = -4 + m

Solving
-15m = -4 + 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.
-15m + -1m = -4 + m + -1m

Combine like terms: -15m + -1m = -16m
-16m = -4 + m + -1m

Combine like terms: m + -1m = 0
-16m = -4 + 0
-16m = -4

Divide each side by '-16'.
m = 0.25

Simplifying
m = 0.25