20-m=9m

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Solution for 20-m=9m equation:


Simplifying
20 + -1m = 9m

Solving
20 + -1m = 9m

Solving for variable 'm'.

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

Add '-9m' to each side of the equation.
20 + -1m + -9m = 9m + -9m

Combine like terms: -1m + -9m = -10m
20 + -10m = 9m + -9m

Combine like terms: 9m + -9m = 0
20 + -10m = 0

Add '-20' to each side of the equation.
20 + -20 + -10m = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -10m = 0 + -20
-10m = 0 + -20

Combine like terms: 0 + -20 = -20
-10m = -20

Divide each side by '-10'.
m = 2

Simplifying
m = 2

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