-3(m+4)=9

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Solution for -3(m+4)=9 equation: 


Simplifying
-3(m + 4) = 9

Reorder the terms:
-3(4 + m) = 9
(4 * -3 + m * -3) = 9
(-12 + -3m) = 9

Solving
-12 + -3m = 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 + -3m = 9 + 12

Combine like terms: -12 + 12 = 0
0 + -3m = 9 + 12
-3m = 9 + 12

Combine like terms: 9 + 12 = 21
-3m = 21

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

Simplifying
m = -7

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