3a+6a=-9a

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Solution for 3a+6a=-9a equation: 


Simplifying
3a + 6a = -9a

Combine like terms: 3a + 6a = 9a
9a = -9a

Solving
9a = -9a

Solving for variable 'a'.

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

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

Combine like terms: 9a + 9a = 18a
18a = -9a + 9a

Combine like terms: -9a + 9a = 0
18a = 0

Divide each side by '18'.
a = 0

Simplifying
a = 0

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