-4(-M-7)=80

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Solution for -4(-M-7)=80 equation: 


Simplifying
-4(-1M + -7) = 80

Reorder the terms:
-4(-7 + -1M) = 80
(-7 * -4 + -1M * -4) = 80
(28 + 4M) = 80

Solving
28 + 4M = 80

Solving for variable 'M'.

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

Add '-28' to each side of the equation.
28 + -28 + 4M = 80 + -28

Combine like terms: 28 + -28 = 0
0 + 4M = 80 + -28
4M = 80 + -28

Combine like terms: 80 + -28 = 52
4M = 52

Divide each side by '4'.
M = 13

Simplifying
M = 13

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