4m-8=-20

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Solution for 4m-8=-20 equation: 


Simplifying
4m + -8 = -20

Reorder the terms:
-8 + 4m = -20

Solving
-8 + 4m = -20

Solving for variable 'm'.

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

Add '8' to each side of the equation.
-8 + 8 + 4m = -20 + 8

Combine like terms: -8 + 8 = 0
0 + 4m = -20 + 8
4m = -20 + 8

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

Divide each side by '4'.
m = -3

Simplifying
m = -3

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