-21m-9=66

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Solution for -21m-9=66 equation: 


Simplifying
-21m + -9 = 66

Reorder the terms:
-9 + -21m = 66

Solving
-9 + -21m = 66

Solving for variable 'm'.

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

Add '9' to each side of the equation.
-9 + 9 + -21m = 66 + 9

Combine like terms: -9 + 9 = 0
0 + -21m = 66 + 9
-21m = 66 + 9

Combine like terms: 66 + 9 = 75
-21m = 75

Divide each side by '-21'.
m = -3.571428571

Simplifying
m = -3.571428571

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