3a+9a=0

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Solution for 3a+9a=0 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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