-3-3a=-12

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Solution for -3-3a=-12 equation: 


Simplifying
-3 + -3a = -12

Solving
-3 + -3a = -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 + -3a = -12 + 3

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

Combine like terms: -12 + 3 = -9
-3a = -9

Divide each side by '-3'.
a = 3

Simplifying
a = 3

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