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x^{2}=\left(x-10\right)\left(x-2\right)
Variable x cannot be equal to any of the values 2,10 since division by zero is not defined. Multiply both sides of the equation by \left(x-10\right)\left(x-2\right).
x^{2}=x^{2}-12x+20
Use the distributive property to multiply x-10 by x-2 and combine like terms.
x^{2}-x^{2}=-12x+20
Subtract x^{2} from both sides.
0=-12x+20
Combine x^{2} and -x^{2} to get 0.
-12x+20=0
Swap sides so that all variable terms are on the left hand side.
-12x=-20
Subtract 20 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-20}{-12}
Divide both sides by -12.
x=\frac{5}{3}
Reduce the fraction \frac{-20}{-12} to lowest terms by extracting and canceling out -4.