100=m-21

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Solution for 100=m-21 equation:


Simplifying
100 = m + -21

Reorder the terms:
100 = -21 + m

Solving
100 = -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.
100 + -1m = -21 + m + -1m

Combine like terms: m + -1m = 0
100 + -1m = -21 + 0
100 + -1m = -21

Add '-100' to each side of the equation.
100 + -100 + -1m = -21 + -100

Combine like terms: 100 + -100 = 0
0 + -1m = -21 + -100
-1m = -21 + -100

Combine like terms: -21 + -100 = -121
-1m = -121

Divide each side by '-1'.
m = 121

Simplifying
m = 121

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