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\left(x-5\right)\left(x+3\right)=\left(x-2\right)\left(x+10\right)
Variable x cannot be equal to any of the values 2,5 since division by zero is not defined. Multiply both sides of the equation by \left(x-5\right)\left(x-2\right), the least common multiple of x-2,x-5.
x^{2}-2x-15=\left(x-2\right)\left(x+10\right)
Use the distributive property to multiply x-5 by x+3 and combine like terms.
x^{2}-2x-15=x^{2}+8x-20
Use the distributive property to multiply x-2 by x+10 and combine like terms.
x^{2}-2x-15-x^{2}=8x-20
Subtract x^{2} from both sides.
-2x-15=8x-20
Combine x^{2} and -x^{2} to get 0.
-2x-15-8x=-20
Subtract 8x from both sides.
-10x-15=-20
Combine -2x and -8x to get -10x.
-10x=-20+15
Add 15 to both sides.
-10x=-5
Add -20 and 15 to get -5.
x=\frac{-5}{-10}
Divide both sides by -10.
x=\frac{1}{2}
Reduce the fraction \frac{-5}{-10} to lowest terms by extracting and canceling out -5.