-21=5m-2m

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Solution for -21=5m-2m equation:


Simplifying
-21 = 5m + -2m

Combine like terms: 5m + -2m = 3m
-21 = 3m

Solving
-21 = 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.
-21 + -3m = 3m + -3m

Combine like terms: 3m + -3m = 0
-21 + -3m = 0

Add '21' to each side of the equation.
-21 + 21 + -3m = 0 + 21

Combine like terms: -21 + 21 = 0
0 + -3m = 0 + 21
-3m = 0 + 21

Combine like terms: 0 + 21 = 21
-3m = 21

Divide each side by '-3'.
m = -7

Simplifying
m = -7

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