-2(3m+6)-(4m-3)=21

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Solution for -2(3m+6)-(4m-3)=21 equation:


Simplifying
-2(3m + 6) + -1(4m + -3) = 21

Reorder the terms:
-2(6 + 3m) + -1(4m + -3) = 21
(6 * -2 + 3m * -2) + -1(4m + -3) = 21
(-12 + -6m) + -1(4m + -3) = 21

Reorder the terms:
-12 + -6m + -1(-3 + 4m) = 21
-12 + -6m + (-3 * -1 + 4m * -1) = 21
-12 + -6m + (3 + -4m) = 21

Reorder the terms:
-12 + 3 + -6m + -4m = 21

Combine like terms: -12 + 3 = -9
-9 + -6m + -4m = 21

Combine like terms: -6m + -4m = -10m
-9 + -10m = 21

Solving
-9 + -10m = 21

Solving for variable 'm'.

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

Add '9' to each side of the equation.
-9 + 9 + -10m = 21 + 9

Combine like terms: -9 + 9 = 0
0 + -10m = 21 + 9
-10m = 21 + 9

Combine like terms: 21 + 9 = 30
-10m = 30

Divide each side by '-10'.
m = -3

Simplifying
m = -3

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