Solve for x
x=9
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x^{2}-18=x^{2}-2x
Use the distributive property to multiply x by x-2.
x^{2}-18-x^{2}=-2x
Subtract x^{2} from both sides.
-18=-2x
Combine x^{2} and -x^{2} to get 0.
-2x=-18
Swap sides so that all variable terms are on the left hand side.
x=\frac{-18}{-2}
Divide both sides by -2.
x=9
Divide -18 by -2 to get 9.
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Limits
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