9x-81=3x-9

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Solution for 9x-81=3x-9 equation:


Simplifying
9x + -81 = 3x + -9

Reorder the terms:
-81 + 9x = 3x + -9

Reorder the terms:
-81 + 9x = -9 + 3x

Solving
-81 + 9x = -9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-81 + 9x + -3x = -9 + 3x + -3x

Combine like terms: 9x + -3x = 6x
-81 + 6x = -9 + 3x + -3x

Combine like terms: 3x + -3x = 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 = 72
6x = 72

Divide each side by '6'.
x = 12

Simplifying
x = 12

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