12-9(2-m)=30

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Solution for 12-9(2-m)=30 equation: 


Simplifying
12 + -9(2 + -1m) = 30
12 + (2 * -9 + -1m * -9) = 30
12 + (-18 + 9m) = 30

Combine like terms: 12 + -18 = -6
-6 + 9m = 30

Solving
-6 + 9m = 30

Solving for variable 'm'.

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

Add '6' to each side of the equation.
-6 + 6 + 9m = 30 + 6

Combine like terms: -6 + 6 = 0
0 + 9m = 30 + 6
9m = 30 + 6

Combine like terms: 30 + 6 = 36
9m = 36

Divide each side by '9'.
m = 4

Simplifying
m = 4

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