-3(7-m)=-4(2-m)

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Solution for -3(7-m)=-4(2-m) equation: 


Simplifying
-3(7 + -1m) = -4(2 + -1m)
(7 * -3 + -1m * -3) = -4(2 + -1m)
(-21 + 3m) = -4(2 + -1m)
-21 + 3m = (2 * -4 + -1m * -4)
-21 + 3m = (-8 + 4m)

Solving
-21 + 3m = -8 + 4m

Solving for variable 'm'.

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

Add '-4m' to each side of the equation.
-21 + 3m + -4m = -8 + 4m + -4m

Combine like terms: 3m + -4m = -1m
-21 + -1m = -8 + 4m + -4m

Combine like terms: 4m + -4m = 0
-21 + -1m = -8 + 0
-21 + -1m = -8

Add '21' to each side of the equation.
-21 + 21 + -1m = -8 + 21

Combine like terms: -21 + 21 = 0
0 + -1m = -8 + 21
-1m = -8 + 21

Combine like terms: -8 + 21 = 13
-1m = 13

Divide each side by '-1'.
m = -13

Simplifying
m = -13

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