-2(a-9)=108+7a

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Solution for -2(a-9)=108+7a equation:


Simplifying
-2(a + -9) = 108 + 7a

Reorder the terms:
-2(-9 + a) = 108 + 7a
(-9 * -2 + a * -2) = 108 + 7a
(18 + -2a) = 108 + 7a

Solving
18 + -2a = 108 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
18 + -2a + -7a = 108 + 7a + -7a

Combine like terms: -2a + -7a = -9a
18 + -9a = 108 + 7a + -7a

Combine like terms: 7a + -7a = 0
18 + -9a = 108 + 0
18 + -9a = 108

Add '-18' to each side of the equation.
18 + -18 + -9a = 108 + -18

Combine like terms: 18 + -18 = 0
0 + -9a = 108 + -18
-9a = 108 + -18

Combine like terms: 108 + -18 = 90
-9a = 90

Divide each side by '-9'.
a = -10

Simplifying
a = -10

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