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8\sqrt{5}-2x-\frac{1}{2}x=2\sqrt{5}
Subtract \frac{1}{2}x from both sides.
8\sqrt{5}-\frac{5}{2}x=2\sqrt{5}
Combine -2x and -\frac{1}{2}x to get -\frac{5}{2}x.
-\frac{5}{2}x=2\sqrt{5}-8\sqrt{5}
Subtract 8\sqrt{5} from both sides.
-\frac{5}{2}x=-6\sqrt{5}
Combine 2\sqrt{5} and -8\sqrt{5} to get -6\sqrt{5}.
\frac{-\frac{5}{2}x}{-\frac{5}{2}}=-\frac{6\sqrt{5}}{-\frac{5}{2}}
Divide both sides of the equation by -\frac{5}{2}, which is the same as multiplying both sides by the reciprocal of the fraction.
x=-\frac{6\sqrt{5}}{-\frac{5}{2}}
Dividing by -\frac{5}{2} undoes the multiplication by -\frac{5}{2}.
x=\frac{12\sqrt{5}}{5}
Divide -6\sqrt{5} by -\frac{5}{2} by multiplying -6\sqrt{5} by the reciprocal of -\frac{5}{2}.