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\frac{2}{5}x+120=\left(9600-x\right)\times \frac{40}{100}-120
Reduce the fraction \frac{40}{100} to lowest terms by extracting and canceling out 20.
\frac{2}{5}x+120=\left(9600-x\right)\times \frac{2}{5}-120
Reduce the fraction \frac{40}{100} to lowest terms by extracting and canceling out 20.
\frac{2}{5}x+120=9600\times \frac{2}{5}-x\times \frac{2}{5}-120
Use the distributive property to multiply 9600-x by \frac{2}{5}.
\frac{2}{5}x+120=\frac{9600\times 2}{5}-x\times \frac{2}{5}-120
Express 9600\times \frac{2}{5} as a single fraction.
\frac{2}{5}x+120=\frac{19200}{5}-x\times \frac{2}{5}-120
Multiply 9600 and 2 to get 19200.
\frac{2}{5}x+120=3840-x\times \frac{2}{5}-120
Divide 19200 by 5 to get 3840.
\frac{2}{5}x+120=3840-\frac{2}{5}x-120
Multiply -1 and \frac{2}{5} to get -\frac{2}{5}.
\frac{2}{5}x+120=3720-\frac{2}{5}x
Subtract 120 from 3840 to get 3720.
\frac{2}{5}x+120+\frac{2}{5}x=3720
Add \frac{2}{5}x to both sides.
\frac{4}{5}x+120=3720
Combine \frac{2}{5}x and \frac{2}{5}x to get \frac{4}{5}x.
\frac{4}{5}x=3720-120
Subtract 120 from both sides.
\frac{4}{5}x=3600
Subtract 120 from 3720 to get 3600.
x=3600\times \frac{5}{4}
Multiply both sides by \frac{5}{4}, the reciprocal of \frac{4}{5}.
x=\frac{3600\times 5}{4}
Express 3600\times \frac{5}{4} as a single fraction.
x=\frac{18000}{4}
Multiply 3600 and 5 to get 18000.
x=4500
Divide 18000 by 4 to get 4500.