12-m=9

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Solution for 12-m=9 equation: 


Simplifying
12 + -1m = 9

Solving
12 + -1m = 9

Solving for variable 'm'.

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

Add '-12' to each side of the equation.
12 + -12 + -1m = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -1m = 9 + -12
-1m = 9 + -12

Combine like terms: 9 + -12 = -3
-1m = -3

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

Simplifying
m = 3

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