-4a+2a=12

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Solution for -4a+2a=12 equation: 


Simplifying
-4a + 2a = 12

Combine like terms: -4a + 2a = -2a
-2a = 12

Solving
-2a = 12

Solving for variable 'a'.

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

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

Simplifying
a = -6

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