2m-3=4m-21

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Solution for 2m-3=4m-21 equation:


Simplifying
2m + -3 = 4m + -21

Reorder the terms:
-3 + 2m = 4m + -21

Reorder the terms:
-3 + 2m = -21 + 4m

Solving
-3 + 2m = -21 + 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.
-3 + 2m + -4m = -21 + 4m + -4m

Combine like terms: 2m + -4m = -2m
-3 + -2m = -21 + 4m + -4m

Combine like terms: 4m + -4m = 0
-3 + -2m = -21 + 0
-3 + -2m = -21

Add '3' to each side of the equation.
-3 + 3 + -2m = -21 + 3

Combine like terms: -3 + 3 = 0
0 + -2m = -21 + 3
-2m = -21 + 3

Combine like terms: -21 + 3 = -18
-2m = -18

Divide each side by '-2'.
m = 9

Simplifying
m = 9

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