A+42=12

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Solution for A+42=12 equation: 


Simplifying
A + 42 = 12

Reorder the terms:
42 + A = 12

Solving
42 + A = 12

Solving for variable 'A'.

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

Add '-42' to each side of the equation.
42 + -42 + A = 12 + -42

Combine like terms: 42 + -42 = 0
0 + A = 12 + -42
A = 12 + -42

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

Simplifying
A = -30

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