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x^{2}+6-\left(x-5\right)x=2x
Variable x cannot be equal to 5 since division by zero is not defined. Multiply both sides of the equation by 2\left(x-5\right), the least common multiple of 2x-10,2,x-5.
x^{2}+6-\left(x^{2}-5x\right)=2x
Use the distributive property to multiply x-5 by x.
x^{2}+6-x^{2}+5x=2x
To find the opposite of x^{2}-5x, find the opposite of each term.
6+5x=2x
Combine x^{2} and -x^{2} to get 0.
6+5x-2x=0
Subtract 2x from both sides.
6+3x=0
Combine 5x and -2x to get 3x.
3x=-6
Subtract 6 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-6}{3}
Divide both sides by 3.
x=-2
Divide -6 by 3 to get -2.