42=30-m

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Solution for 42=30-m equation:


Simplifying
42 = 30 + -1m

Solving
42 = 30 + -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.
42 + m = 30 + -1m + m

Combine like terms: -1m + m = 0
42 + m = 30 + 0
42 + m = 30

Add '-42' to each side of the equation.
42 + -42 + m = 30 + -42

Combine like terms: 42 + -42 = 0
0 + m = 30 + -42
m = 30 + -42

Combine like terms: 30 + -42 = -12
m = -12

Simplifying
m = -12

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