126=42-m

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Solution for 126=42-m equation:


Simplifying
126 = 42 + -1m

Solving
126 = 42 + -1m

Solving for variable 'm'.

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

Add 'm' to each side of the equation.
126 + m = 42 + -1m + m

Combine like terms: -1m + m = 0
126 + m = 42 + 0
126 + m = 42

Add '-126' to each side of the equation.
126 + -126 + m = 42 + -126

Combine like terms: 126 + -126 = 0
0 + m = 42 + -126
m = 42 + -126

Combine like terms: 42 + -126 = -84
m = -84

Simplifying
m = -84

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