A+3=-12

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Solution for A+3=-12 equation: 


Simplifying
A + 3 = -12

Reorder the terms:
3 + A = -12

Solving
3 + A = -12

Solving for variable 'A'.

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

Add '-3' to each side of the equation.
3 + -3 + A = -12 + -3

Combine like terms: 3 + -3 = 0
0 + A = -12 + -3
A = -12 + -3

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

Simplifying
A = -15

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