m-(12+3m)=8m-(21+7m)

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Solution for m-(12+3m)=8m-(21+7m) equation:


Simplifying
m + -1(12 + 3m) = 8m + -1(21 + 7m)
m + (12 * -1 + 3m * -1) = 8m + -1(21 + 7m)
m + (-12 + -3m) = 8m + -1(21 + 7m)

Reorder the terms:
-12 + m + -3m = 8m + -1(21 + 7m)

Combine like terms: m + -3m = -2m
-12 + -2m = 8m + -1(21 + 7m)
-12 + -2m = 8m + (21 * -1 + 7m * -1)
-12 + -2m = 8m + (-21 + -7m)

Reorder the terms:
-12 + -2m = -21 + 8m + -7m

Combine like terms: 8m + -7m = 1m
-12 + -2m = -21 + 1m

Solving
-12 + -2m = -21 + 1m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
-12 + -2m + -1m = -21 + 1m + -1m

Combine like terms: -2m + -1m = -3m
-12 + -3m = -21 + 1m + -1m

Combine like terms: 1m + -1m = 0
-12 + -3m = -21 + 0
-12 + -3m = -21

Add '12' to each side of the equation.
-12 + 12 + -3m = -21 + 12

Combine like terms: -12 + 12 = 0
0 + -3m = -21 + 12
-3m = -21 + 12

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

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

Simplifying
m = 3

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