7(-m-3n)=

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


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

Solving
-7m + -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.
-7m + -21n + 21n = 0 + 21n

Combine like terms: -21n + 21n = 0
-7m + 0 = 0 + 21n
-7m = 0 + 21n
Remove the zero:
-7m = 21n

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

Simplifying
m = -3n

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