3(-m-7n)=

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Solution for 3(-m-7n)= equation: 


Simplifying
3(-1m + -7n) = 0
(-1m * 3 + -7n * 3) = 0
(-3m + -21n) = 0

Solving
-3m + -21n = 0

Solving for variable 'm'.

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

Add '21n' to each side of the equation.
-3m + -21n + 21n = 0 + 21n

Combine like terms: -21n + 21n = 0
-3m + 0 = 0 + 21n
-3m = 0 + 21n
Remove the zero:
-3m = 21n

Divide each side by '-3'.
m = -7n

Simplifying
m = -7n

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