A=12+(3-7a)

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Solution for A=12+(3-7a) equation: 


Simplifying
A = 12 + (3 + -7a)

Remove parenthesis around (3 + -7a)
A = 12 + 3 + -7a

Combine like terms: 12 + 3 = 15
A = 15 + -7a

Solving
A = 15 + -7a

Solving for variable 'A'.

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

Simplifying
A = 15 + -7a

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