86=-7(a-2)-2a

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Solution for 86=-7(a-2)-2a equation:


Simplifying
86 = -7(a + -2) + -2a

Reorder the terms:
86 = -7(-2 + a) + -2a
86 = (-2 * -7 + a * -7) + -2a
86 = (14 + -7a) + -2a

Combine like terms: -7a + -2a = -9a
86 = 14 + -9a

Solving
86 = 14 + -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.
86 + 9a = 14 + -9a + 9a

Combine like terms: -9a + 9a = 0
86 + 9a = 14 + 0
86 + 9a = 14

Add '-86' to each side of the equation.
86 + -86 + 9a = 14 + -86

Combine like terms: 86 + -86 = 0
0 + 9a = 14 + -86
9a = 14 + -86

Combine like terms: 14 + -86 = -72
9a = -72

Divide each side by '9'.
a = -8

Simplifying
a = -8

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