42+m=-21

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Solution for 42+m=-21 equation: 


Simplifying
42 + m = -21

Solving
42 + m = -21

Solving for variable 'm'.

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

Add '-42' to each side of the equation.
42 + -42 + m = -21 + -42

Combine like terms: 42 + -42 = 0
0 + m = -21 + -42
m = -21 + -42

Combine like terms: -21 + -42 = -63
m = -63

Simplifying
m = -63

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