4(2-m)-21=m+7

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Solution for 4(2-m)-21=m+7 equation: 


Simplifying
4(2 + -1m) + -21 = m + 7
(2 * 4 + -1m * 4) + -21 = m + 7
(8 + -4m) + -21 = m + 7

Reorder the terms:
8 + -21 + -4m = m + 7

Combine like terms: 8 + -21 = -13
-13 + -4m = m + 7

Reorder the terms:
-13 + -4m = 7 + m

Solving
-13 + -4m = 7 + m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
-13 + -4m + -1m = 7 + m + -1m

Combine like terms: -4m + -1m = -5m
-13 + -5m = 7 + m + -1m

Combine like terms: m + -1m = 0
-13 + -5m = 7 + 0
-13 + -5m = 7

Add '13' to each side of the equation.
-13 + 13 + -5m = 7 + 13

Combine like terms: -13 + 13 = 0
0 + -5m = 7 + 13
-5m = 7 + 13

Combine like terms: 7 + 13 = 20
-5m = 20

Divide each side by '-5'.
m = -4

Simplifying
m = -4

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