12=-m-3m

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Solution for 12=-m-3m equation:


Simplifying
12 = -1m + -3m

Combine like terms: -1m + -3m = -4m
12 = -4m

Solving
12 = -4m

Solving for variable 'm'.

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

Add '4m' to each side of the equation.
12 + 4m = -4m + 4m

Combine like terms: -4m + 4m = 0
12 + 4m = 0

Add '-12' to each side of the equation.
12 + -12 + 4m = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 4m = 0 + -12
4m = 0 + -12

Combine like terms: 0 + -12 = -12
4m = -12

Divide each side by '4'.
m = -3

Simplifying
m = -3

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