9+A=-12

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Solution for 9+A=-12 equation: 


Simplifying
9 + A = -12

Solving
9 + A = -12

Solving for variable 'A'.

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

Add '-9' to each side of the equation.
9 + -9 + A = -12 + -9

Combine like terms: 9 + -9 = 0
0 + A = -12 + -9
A = -12 + -9

Combine like terms: -12 + -9 = -21
A = -21

Simplifying
A = -21

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