129=-6(3+7m)-7m

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Solution for 129=-6(3+7m)-7m equation:


Simplifying
129 = -6(3 + 7m) + -7m
129 = (3 * -6 + 7m * -6) + -7m
129 = (-18 + -42m) + -7m

Combine like terms: -42m + -7m = -49m
129 = -18 + -49m

Solving
129 = -18 + -49m

Solving for variable 'm'.

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

Add '49m' to each side of the equation.
129 + 49m = -18 + -49m + 49m

Combine like terms: -49m + 49m = 0
129 + 49m = -18 + 0
129 + 49m = -18

Add '-129' to each side of the equation.
129 + -129 + 49m = -18 + -129

Combine like terms: 129 + -129 = 0
0 + 49m = -18 + -129
49m = -18 + -129

Combine like terms: -18 + -129 = -147
49m = -147

Divide each side by '49'.
m = -3

Simplifying
m = -3

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