3=-m-2m

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Solution for 3=-m-2m equation:


Simplifying
3 = -1m + -2m

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

Solving
3 = -3m

Solving for variable 'm'.

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

Add '3m' to each side of the equation.
3 + 3m = -3m + 3m

Combine like terms: -3m + 3m = 0
3 + 3m = 0

Add '-3' to each side of the equation.
3 + -3 + 3m = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 3m = 0 + -3
3m = 0 + -3

Combine like terms: 0 + -3 = -3
3m = -3

Divide each side by '3'.
m = -1

Simplifying
m = -1

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