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3x-\left(x-2\right)=6
Multiply both sides of the equation by 3.
3x-x-\left(-2\right)=6
To find the opposite of x-2, find the opposite of each term.
3x-x+2=6
The opposite of -2 is 2.
2x+2=6
Combine 3x and -x to get 2x.
2x=6-2
Subtract 2 from both sides.
2x=4
Subtract 2 from 6 to get 4.
x=\frac{4}{2}
Divide both sides by 2.
x=2
Divide 4 by 2 to get 2.