3x+3(x-1)=9

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


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

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

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

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

Solving
-3 + 6x = 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 + 6x = 9 + 3

Combine like terms: -3 + 3 = 0
0 + 6x = 9 + 3
6x = 9 + 3

Combine like terms: 9 + 3 = 12
6x = 12

Divide each side by '6'.
x = 2

Simplifying
x = 2

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