4m-7+3m=21

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Solution for 4m-7+3m=21 equation: 


Simplifying
4m + -7 + 3m = 21

Reorder the terms:
-7 + 4m + 3m = 21

Combine like terms: 4m + 3m = 7m
-7 + 7m = 21

Solving
-7 + 7m = 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 + 7m = 21 + 7

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

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

Divide each side by '7'.
m = 4

Simplifying
m = 4

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