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\frac{2}{3}x+48=\left(x-20\right)\times 2
Add 28 and 20 to get 48.
\frac{2}{3}x+48=2x-40
Use the distributive property to multiply x-20 by 2.
\frac{2}{3}x+48-2x=-40
Subtract 2x from both sides.
-\frac{4}{3}x+48=-40
Combine \frac{2}{3}x and -2x to get -\frac{4}{3}x.
-\frac{4}{3}x=-40-48
Subtract 48 from both sides.
-\frac{4}{3}x=-88
Subtract 48 from -40 to get -88.
x=-88\left(-\frac{3}{4}\right)
Multiply both sides by -\frac{3}{4}, the reciprocal of -\frac{4}{3}.
x=\frac{-88\left(-3\right)}{4}
Express -88\left(-\frac{3}{4}\right) as a single fraction.
x=\frac{264}{4}
Multiply -88 and -3 to get 264.
x=66
Divide 264 by 4 to get 66.