12m-(6m+7)-8m=15

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Solution for 12m-(6m+7)-8m=15 equation:


Simplifying
12m + -1(6m + 7) + -8m = 15

Reorder the terms:
12m + -1(7 + 6m) + -8m = 15
12m + (7 * -1 + 6m * -1) + -8m = 15
12m + (-7 + -6m) + -8m = 15

Reorder the terms:
-7 + 12m + -6m + -8m = 15

Combine like terms: 12m + -6m = 6m
-7 + 6m + -8m = 15

Combine like terms: 6m + -8m = -2m
-7 + -2m = 15

Solving
-7 + -2m = 15

Solving for variable 'm'.

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

Add '7' to each side of the equation.
-7 + 7 + -2m = 15 + 7

Combine like terms: -7 + 7 = 0
0 + -2m = 15 + 7
-2m = 15 + 7

Combine like terms: 15 + 7 = 22
-2m = 22

Divide each side by '-2'.
m = -11

Simplifying
m = -11

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