21+6m=30+7m-7

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Solution for 21+6m=30+7m-7 equation:


Simplifying
21 + 6m = 30 + 7m + -7

Reorder the terms:
21 + 6m = 30 + -7 + 7m

Combine like terms: 30 + -7 = 23
21 + 6m = 23 + 7m

Solving
21 + 6m = 23 + 7m

Solving for variable 'm'.

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

Add '-7m' to each side of the equation.
21 + 6m + -7m = 23 + 7m + -7m

Combine like terms: 6m + -7m = -1m
21 + -1m = 23 + 7m + -7m

Combine like terms: 7m + -7m = 0
21 + -1m = 23 + 0
21 + -1m = 23

Add '-21' to each side of the equation.
21 + -21 + -1m = 23 + -21

Combine like terms: 21 + -21 = 0
0 + -1m = 23 + -21
-1m = 23 + -21

Combine like terms: 23 + -21 = 2
-1m = 2

Divide each side by '-1'.
m = -2

Simplifying
m = -2

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