-9=4m-8m

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Solution for -9=4m-8m equation:


Simplifying
-9 = 4m + -8m

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

Solving
-9 = -4m

Solving for variable 'm'.

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

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

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

Add '9' to each side of the equation.
-9 + 9 + 4m = 0 + 9

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

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

Divide each side by '4'.
m = 2.25

Simplifying
m = 2.25

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