3-4m=8m-21

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Solution for 3-4m=8m-21 equation:


Simplifying
3 + -4m = 8m + -21

Reorder the terms:
3 + -4m = -21 + 8m

Solving
3 + -4m = -21 + 8m

Solving for variable 'm'.

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

Add '-8m' to each side of the equation.
3 + -4m + -8m = -21 + 8m + -8m

Combine like terms: -4m + -8m = -12m
3 + -12m = -21 + 8m + -8m

Combine like terms: 8m + -8m = 0
3 + -12m = -21 + 0
3 + -12m = -21

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

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

Combine like terms: -21 + -3 = -24
-12m = -24

Divide each side by '-12'.
m = 2

Simplifying
m = 2

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