8m+20=12m-9

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Solution for 8m+20=12m-9 equation:


Simplifying
8m + 20 = 12m + -9

Reorder the terms:
20 + 8m = 12m + -9

Reorder the terms:
20 + 8m = -9 + 12m

Solving
20 + 8m = -9 + 12m

Solving for variable 'm'.

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

Add '-12m' to each side of the equation.
20 + 8m + -12m = -9 + 12m + -12m

Combine like terms: 8m + -12m = -4m
20 + -4m = -9 + 12m + -12m

Combine like terms: 12m + -12m = 0
20 + -4m = -9 + 0
20 + -4m = -9

Add '-20' to each side of the equation.
20 + -20 + -4m = -9 + -20

Combine like terms: 20 + -20 = 0
0 + -4m = -9 + -20
-4m = -9 + -20

Combine like terms: -9 + -20 = -29
-4m = -29

Divide each side by '-4'.
m = 7.25

Simplifying
m = 7.25

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