(3x-9)=81

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


Simplifying
(3x + -9) = 81

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

Remove parenthesis around (-9 + 3x)
-9 + 3x = 81

Solving
-9 + 3x = 81

Solving for variable 'x'.

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

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

Combine like terms: -9 + 9 = 0
0 + 3x = 81 + 9
3x = 81 + 9

Combine like terms: 81 + 9 = 90
3x = 90

Divide each side by '3'.
x = 30

Simplifying
x = 30

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