3(x-1)-x=9

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Solution for 3(x-1)-x=9 equation: 


Simplifying
3(x + -1) + -1x = 9

Reorder the terms:
3(-1 + x) + -1x = 9
(-1 * 3 + x * 3) + -1x = 9
(-3 + 3x) + -1x = 9

Combine like terms: 3x + -1x = 2x
-3 + 2x = 9

Solving
-3 + 2x = 9

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 2x = 9 + 3

Combine like terms: -3 + 3 = 0
0 + 2x = 9 + 3
2x = 9 + 3

Combine like terms: 9 + 3 = 12
2x = 12

Divide each side by '2'.
x = 6

Simplifying
x = 6

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