-2a+12+4a=7a-9a

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Solution for -2a+12+4a=7a-9a equation:


Simplifying
-2a + 12 + 4a = 7a + -9a

Reorder the terms:
12 + -2a + 4a = 7a + -9a

Combine like terms: -2a + 4a = 2a
12 + 2a = 7a + -9a

Combine like terms: 7a + -9a = -2a
12 + 2a = -2a

Solving
12 + 2a = -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.
12 + 2a + 2a = -2a + 2a

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

Combine like terms: -2a + 2a = 0
12 + 4a = 0

Add '-12' to each side of the equation.
12 + -12 + 4a = 0 + -12

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

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

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

Simplifying
a = -3

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