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3\times 2-\left(12-3x\right)=x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 3x, the least common multiple of x,3.
6-\left(12-3x\right)=x
Multiply 3 and 2 to get 6.
6-12+3x=x
To find the opposite of 12-3x, find the opposite of each term.
-6+3x=x
Subtract 12 from 6 to get -6.
-6+3x-x=0
Subtract x from both sides.
-6+2x=0
Combine 3x and -x to get 2x.
2x=6
Add 6 to both sides. Anything plus zero gives itself.
x=\frac{6}{2}
Divide both sides by 2.
x=3
Divide 6 by 2 to get 3.