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2\left(12-x\right)=x
Multiply both sides of the equation by 12, the least common multiple of 6,12.
24-2x=x
Use the distributive property to multiply 2 by 12-x.
24-2x-x=0
Subtract x from both sides.
24-3x=0
Combine -2x and -x to get -3x.
-3x=-24
Subtract 24 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-24}{-3}
Divide both sides by -3.
x=8
Divide -24 by -3 to get 8.