21+-3m=75

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Solution for 21+-3m=75 equation: 


Simplifying
21 + -3m = 75

Solving
21 + -3m = 75

Solving for variable 'm'.

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

Add '-21' to each side of the equation.
21 + -21 + -3m = 75 + -21

Combine like terms: 21 + -21 = 0
0 + -3m = 75 + -21
-3m = 75 + -21

Combine like terms: 75 + -21 = 54
-3m = 54

Divide each side by '-3'.
m = -18

Simplifying
m = -18

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