-21=1+3m-4

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Solution for -21=1+3m-4 equation:


Simplifying
-21 = 1 + 3m + -4

Reorder the terms:
-21 = 1 + -4 + 3m

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

Solving
-21 = -3 + 3m

Solving for variable 'm'.

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

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

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

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

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

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

Divide each side by '-3'.
m = -6

Simplifying
m = -6

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