A+-8=12

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Solution for A+-8=12 equation: 


Simplifying
A + -8 = 12

Reorder the terms:
-8 + A = 12

Solving
-8 + A = 12

Solving for variable 'A'.

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

Add '8' to each side of the equation.
-8 + 8 + A = 12 + 8

Combine like terms: -8 + 8 = 0
0 + A = 12 + 8
A = 12 + 8

Combine like terms: 12 + 8 = 20
A = 20

Simplifying
A = 20

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