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-16-xx+x\times 10=x\times 4-xx
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
-16-x^{2}+x\times 10=x\times 4-xx
Multiply x and x to get x^{2}.
-16-x^{2}+x\times 10=x\times 4-x^{2}
Multiply x and x to get x^{2}.
-16-x^{2}+x\times 10-x\times 4=-x^{2}
Subtract x\times 4 from both sides.
-16-x^{2}+6x=-x^{2}
Combine x\times 10 and -x\times 4 to get 6x.
-16-x^{2}+6x+x^{2}=0
Add x^{2} to both sides.
-16+6x=0
Combine -x^{2} and x^{2} to get 0.
6x=16
Add 16 to both sides. Anything plus zero gives itself.
x=\frac{16}{6}
Divide both sides by 6.
x=\frac{8}{3}
Reduce the fraction \frac{16}{6} to lowest terms by extracting and canceling out 2.