5m+9=-21

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Solution for 5m+9=-21 equation: 


Simplifying
5m + 9 = -21

Reorder the terms:
9 + 5m = -21

Solving
9 + 5m = -21

Solving for variable 'm'.

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

Add '-9' to each side of the equation.
9 + -9 + 5m = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 5m = -21 + -9
5m = -21 + -9

Combine like terms: -21 + -9 = -30
5m = -30

Divide each side by '5'.
m = -6

Simplifying
m = -6

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