-9(-9-9a)-(12+8a)-7=-(7-5a)+(-a)+6

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Solution for -9(-9-9a)-(12+8a)-7=-(7-5a)+(-a)+6 equation: 


Simplifying
-9(-9 + -9a) + -1(12 + 8a) + -7 = -1(7 + -5a) + (-1a) + 6
(-9 * -9 + -9a * -9) + -1(12 + 8a) + -7 = -1(7 + -5a) + (-1a) + 6
(81 + 81a) + -1(12 + 8a) + -7 = -1(7 + -5a) + (-1a) + 6
81 + 81a + (12 * -1 + 8a * -1) + -7 = -1(7 + -5a) + (-1a) + 6
81 + 81a + (-12 + -8a) + -7 = -1(7 + -5a) + (-1a) + 6

Reorder the terms:
81 + -12 + -7 + 81a + -8a = -1(7 + -5a) + (-1a) + 6

Combine like terms: 81 + -12 = 69
69 + -7 + 81a + -8a = -1(7 + -5a) + (-1a) + 6

Combine like terms: 69 + -7 = 62
62 + 81a + -8a = -1(7 + -5a) + (-1a) + 6

Combine like terms: 81a + -8a = 73a
62 + 73a = -1(7 + -5a) + (-1a) + 6
62 + 73a = (7 * -1 + -5a * -1) + (-1a) + 6
62 + 73a = (-7 + 5a) + (-1a) + 6

Reorder the terms:
62 + 73a = -7 + 6 + 5a + (-1a)

Combine like terms: -7 + 6 = -1
62 + 73a = -1 + 5a + (-1a)

Combine like terms: 5a + (-1a) = 4a
62 + 73a = -1 + 4a

Solving
62 + 73a = -1 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
62 + 73a + -4a = -1 + 4a + -4a

Combine like terms: 73a + -4a = 69a
62 + 69a = -1 + 4a + -4a

Combine like terms: 4a + -4a = 0
62 + 69a = -1 + 0
62 + 69a = -1

Add '-62' to each side of the equation.
62 + -62 + 69a = -1 + -62

Combine like terms: 62 + -62 = 0
0 + 69a = -1 + -62
69a = -1 + -62

Combine like terms: -1 + -62 = -63
69a = -63

Divide each side by '69'.
a = -0.9130434783

Simplifying
a = -0.9130434783

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