20=-4(5-m)

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Solution for 20=-4(5-m) equation: 


Simplifying
20 = -4(5 + -1m)
20 = (5 * -4 + -1m * -4)
20 = (-20 + 4m)

Solving
20 = -20 + 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.
20 + -4m = -20 + 4m + -4m

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

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

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

Combine like terms: -20 + -20 = -40
-4m = -40

Divide each side by '-4'.
m = 10

Simplifying
m = 10

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