3-2m=-21

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Solution for 3-2m=-21 equation: 


Simplifying
3 + -2m = -21

Solving
3 + -2m = -21

Solving for variable 'm'.

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

Add '-3' to each side of the equation.
3 + -3 + -2m = -21 + -3

Combine like terms: 3 + -3 = 0
0 + -2m = -21 + -3
-2m = -21 + -3

Combine like terms: -21 + -3 = -24
-2m = -24

Divide each side by '-2'.
m = 12

Simplifying
m = 12

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