-m-7=21

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Solution for -m-7=21 equation: 


Simplifying
-1m + -7 = 21

Reorder the terms:
-7 + -1m = 21

Solving
-7 + -1m = 21

Solving for variable 'm'.

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

Add '7' to each side of the equation.
-7 + 7 + -1m = 21 + 7

Combine like terms: -7 + 7 = 0
0 + -1m = 21 + 7
-1m = 21 + 7

Combine like terms: 21 + 7 = 28
-1m = 28

Divide each side by '-1'.
m = -28

Simplifying
m = -28

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