12a=-3a

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Solution for 12a=-3a equation: 


Simplifying
12a = -3a

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

Combine like terms: 12a + 3a = 15a
15a = -3a + 3a

Combine like terms: -3a + 3a = 0
15a = 0

Divide each side by '15'.
a = 0

Simplifying
a = 0

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