81+8x=2x-9

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Solution for 81+8x=2x-9 equation:


Simplifying
81 + 8x = 2x + -9

Reorder the terms:
81 + 8x = -9 + 2x

Solving
81 + 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.
81 + 8x + -2x = -9 + 2x + -2x

Combine like terms: 8x + -2x = 6x
81 + 6x = -9 + 2x + -2x

Combine like terms: 2x + -2x = 0
81 + 6x = -9 + 0
81 + 6x = -9

Add '-81' to each side of the equation.
81 + -81 + 6x = -9 + -81

Combine like terms: 81 + -81 = 0
0 + 6x = -9 + -81
6x = -9 + -81

Combine like terms: -9 + -81 = -90
6x = -90

Divide each side by '6'.
x = -15

Simplifying
x = -15

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