-7a+3a=-12-8a

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Solution for -7a+3a=-12-8a equation: 


Simplifying
-7a + 3a = -12 + -8a

Combine like terms: -7a + 3a = -4a
-4a = -12 + -8a

Solving
-4a = -12 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
-4a + 8a = -12 + -8a + 8a

Combine like terms: -4a + 8a = 4a
4a = -12 + -8a + 8a

Combine like terms: -8a + 8a = 0
4a = -12 + 0
4a = -12

Divide each side by '4'.
a = -3

Simplifying
a = -3

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