8x-129=2x-9

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Solution for 8x-129=2x-9 equation:


Simplifying
8x + -129 = 2x + -9

Reorder the terms:
-129 + 8x = 2x + -9

Reorder the terms:
-129 + 8x = -9 + 2x

Solving
-129 + 8x = -9 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-129 + 8x + -2x = -9 + 2x + -2x

Combine like terms: 8x + -2x = 6x
-129 + 6x = -9 + 2x + -2x

Combine like terms: 2x + -2x = 0
-129 + 6x = -9 + 0
-129 + 6x = -9

Add '129' to each side of the equation.
-129 + 129 + 6x = -9 + 129

Combine like terms: -129 + 129 = 0
0 + 6x = -9 + 129
6x = -9 + 129

Combine like terms: -9 + 129 = 120
6x = 120

Divide each side by '6'.
x = 20

Simplifying
x = 20

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