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\sqrt{2}x+\sqrt{2}=\sqrt{18}
Use the distributive property to multiply \sqrt{2} by x+1.
\sqrt{2}x+\sqrt{2}=3\sqrt{2}
Factor 18=3^{2}\times 2. Rewrite the square root of the product \sqrt{3^{2}\times 2} as the product of square roots \sqrt{3^{2}}\sqrt{2}. Take the square root of 3^{2}.
\sqrt{2}x=3\sqrt{2}-\sqrt{2}
Subtract \sqrt{2} from both sides.
\sqrt{2}x=2\sqrt{2}
Combine 3\sqrt{2} and -\sqrt{2} to get 2\sqrt{2}.
\frac{\sqrt{2}x}{\sqrt{2}}=\frac{2\sqrt{2}}{\sqrt{2}}
Divide both sides by \sqrt{2}.
x=\frac{2\sqrt{2}}{\sqrt{2}}
Dividing by \sqrt{2} undoes the multiplication by \sqrt{2}.
x=2
Divide 2\sqrt{2} by \sqrt{2}.