9a=3a-12

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Solution for 9a=3a-12 equation: 


Simplifying
9a = 3a + -12

Reorder the terms:
9a = -12 + 3a

Solving
9a = -12 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
9a + -3a = -12 + 3a + -3a

Combine like terms: 9a + -3a = 6a
6a = -12 + 3a + -3a

Combine like terms: 3a + -3a = 0
6a = -12 + 0
6a = -12

Divide each side by '6'.
a = -2

Simplifying
a = -2

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