-12=9a+9+6

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


Simplifying
-12 = 9a + 9 + 6

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

Combine like terms: 9 + 6 = 15
-12 = 15 + 9a

Solving
-12 = 15 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
-12 + -9a = 15 + 9a + -9a

Combine like terms: 9a + -9a = 0
-12 + -9a = 15 + 0
-12 + -9a = 15

Add '12' to each side of the equation.
-12 + 12 + -9a = 15 + 12

Combine like terms: -12 + 12 = 0
0 + -9a = 15 + 12
-9a = 15 + 12

Combine like terms: 15 + 12 = 27
-9a = 27

Divide each side by '-9'.
a = -3

Simplifying
a = -3

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