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\left(x^{2}-4\right)\times 5-x\left(x-2\right)\times 3=x\left(x+2\right)\times 2
Variable x cannot be equal to any of the values -2,0,2 since division by zero is not defined. Multiply both sides of the equation by x\left(x-2\right)\left(x+2\right), the least common multiple of x,x+2,x-2.
5x^{2}-20-x\left(x-2\right)\times 3=x\left(x+2\right)\times 2
Use the distributive property to multiply x^{2}-4 by 5.
5x^{2}-20-\left(x^{2}-2x\right)\times 3=x\left(x+2\right)\times 2
Use the distributive property to multiply x by x-2.
5x^{2}-20-\left(3x^{2}-6x\right)=x\left(x+2\right)\times 2
Use the distributive property to multiply x^{2}-2x by 3.
5x^{2}-20-3x^{2}+6x=x\left(x+2\right)\times 2
To find the opposite of 3x^{2}-6x, find the opposite of each term.
2x^{2}-20+6x=x\left(x+2\right)\times 2
Combine 5x^{2} and -3x^{2} to get 2x^{2}.
2x^{2}-20+6x=\left(x^{2}+2x\right)\times 2
Use the distributive property to multiply x by x+2.
2x^{2}-20+6x=2x^{2}+4x
Use the distributive property to multiply x^{2}+2x by 2.
2x^{2}-20+6x-2x^{2}=4x
Subtract 2x^{2} from both sides.
-20+6x=4x
Combine 2x^{2} and -2x^{2} to get 0.
-20+6x-4x=0
Subtract 4x from both sides.
-20+2x=0
Combine 6x and -4x to get 2x.
2x=20
Add 20 to both sides. Anything plus zero gives itself.
x=\frac{20}{2}
Divide both sides by 2.
x=10
Divide 20 by 2 to get 10.