-9a+8-2a+12=-9a+-27-6a+-9

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Solution for -9a+8-2a+12=-9a+-27-6a+-9 equation: 


Simplifying
-9a + 8 + -2a + 12 = -9a + -27 + -6a + -9

Reorder the terms:
8 + 12 + -9a + -2a = -9a + -27 + -6a + -9

Combine like terms: 8 + 12 = 20
20 + -9a + -2a = -9a + -27 + -6a + -9

Combine like terms: -9a + -2a = -11a
20 + -11a = -9a + -27 + -6a + -9

Reorder the terms:
20 + -11a = -27 + -9 + -9a + -6a

Combine like terms: -27 + -9 = -36
20 + -11a = -36 + -9a + -6a

Combine like terms: -9a + -6a = -15a
20 + -11a = -36 + -15a

Solving
20 + -11a = -36 + -15a

Solving for variable 'a'.

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

Add '15a' to each side of the equation.
20 + -11a + 15a = -36 + -15a + 15a

Combine like terms: -11a + 15a = 4a
20 + 4a = -36 + -15a + 15a

Combine like terms: -15a + 15a = 0
20 + 4a = -36 + 0
20 + 4a = -36

Add '-20' to each side of the equation.
20 + -20 + 4a = -36 + -20

Combine like terms: 20 + -20 = 0
0 + 4a = -36 + -20
4a = -36 + -20

Combine like terms: -36 + -20 = -56
4a = -56

Divide each side by '4'.
a = -14

Simplifying
a = -14

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