3a-7a=12-2a

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Solution for 3a-7a=12-2a equation: 


Simplifying
3a + -7a = 12 + -2a

Combine like terms: 3a + -7a = -4a
-4a = 12 + -2a

Solving
-4a = 12 + -2a

Solving for variable 'a'.

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

Add '2a' to each side of the equation.
-4a + 2a = 12 + -2a + 2a

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

Combine like terms: -2a + 2a = 0
-2a = 12 + 0
-2a = 12

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

Simplifying
a = -6

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