-20=-4m-m

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Solution for -20=-4m-m equation:


Simplifying
-20 = -4m + -1m

Combine like terms: -4m + -1m = -5m
-20 = -5m

Solving
-20 = -5m

Solving for variable 'm'.

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

Add '5m' to each side of the equation.
-20 + 5m = -5m + 5m

Combine like terms: -5m + 5m = 0
-20 + 5m = 0

Add '20' to each side of the equation.
-20 + 20 + 5m = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 5m = 0 + 20
5m = 0 + 20

Combine like terms: 0 + 20 = 20
5m = 20

Divide each side by '5'.
m = 4

Simplifying
m = 4

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