(-a)+9=-3

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Solution for (-a)+9=-3 equation: 


Simplifying
(-1a) + 9 = -3

Reorder the terms:
9 + (-1a) = -3

Solving
9 + (-1a) = -3

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 + (-1a) = -3 + -9

Combine like terms: 9 + -9 = 0
0 + (-1a) = -3 + -9
(-1a) = -3 + -9

Combine like terms: -3 + -9 = -12
(-1a) = -12

Divide each side by '-1'.
a = 12

Simplifying
a = 12

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