20-5m=-7(3m+4)

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Solution for 20-5m=-7(3m+4) equation:


Simplifying
20 + -5m = -7(3m + 4)

Reorder the terms:
20 + -5m = -7(4 + 3m)
20 + -5m = (4 * -7 + 3m * -7)
20 + -5m = (-28 + -21m)

Solving
20 + -5m = -28 + -21m

Solving for variable 'm'.

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

Add '21m' to each side of the equation.
20 + -5m + 21m = -28 + -21m + 21m

Combine like terms: -5m + 21m = 16m
20 + 16m = -28 + -21m + 21m

Combine like terms: -21m + 21m = 0
20 + 16m = -28 + 0
20 + 16m = -28

Add '-20' to each side of the equation.
20 + -20 + 16m = -28 + -20

Combine like terms: 20 + -20 = 0
0 + 16m = -28 + -20
16m = -28 + -20

Combine like terms: -28 + -20 = -48
16m = -48

Divide each side by '16'.
m = -3

Simplifying
m = -3

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