-4a+12+7a=6a-9a

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Solution for -4a+12+7a=6a-9a equation:


Simplifying
-4a + 12 + 7a = 6a + -9a

Reorder the terms:
12 + -4a + 7a = 6a + -9a

Combine like terms: -4a + 7a = 3a
12 + 3a = 6a + -9a

Combine like terms: 6a + -9a = -3a
12 + 3a = -3a

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

Combine like terms: 3a + 3a = 6a
12 + 6a = -3a + 3a

Combine like terms: -3a + 3a = 0
12 + 6a = 0

Add '-12' to each side of the equation.
12 + -12 + 6a = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 6a = 0 + -12
6a = 0 + -12

Combine like terms: 0 + -12 = -12
6a = -12

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

Simplifying
a = -2

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