4m-6-8m-9=21

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Solution for 4m-6-8m-9=21 equation:


Simplifying
4m + -6 + -8m + -9 = 21

Reorder the terms:
-6 + -9 + 4m + -8m = 21

Combine like terms: -6 + -9 = -15
-15 + 4m + -8m = 21

Combine like terms: 4m + -8m = -4m
-15 + -4m = 21

Solving
-15 + -4m = 21

Solving for variable 'm'.

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

Add '15' to each side of the equation.
-15 + 15 + -4m = 21 + 15

Combine like terms: -15 + 15 = 0
0 + -4m = 21 + 15
-4m = 21 + 15

Combine like terms: 21 + 15 = 36
-4m = 36

Divide each side by '-4'.
m = -9

Simplifying
m = -9

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