0=m+(-21)

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Solution for 0=m+(-21) equation: 


Simplifying
0 = m + (-21)
0 = m + -21

Reorder the terms:
0 = -21 + m

Solving
0 = -21 + m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
0 + -1m = -21 + m + -1m
Remove the zero:
-1m = -21 + m + -1m

Combine like terms: m + -1m = 0
-1m = -21 + 0
-1m = -21

Divide each side by '-1'.
m = 21

Simplifying
m = 21

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