-3a-9a=

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Solution for -3a-9a= equation: 


Simplifying
-3a + -9a = 0

Combine like terms: -3a + -9a = -12a
-12a = 0

Solving
-12a = 0

Solving for variable 'a'.

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

Divide each side by '-12'.
a = 0

Simplifying
a = 0

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