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\frac{13}{20}x=\frac{85}{100}\left(2490-x\right)
Reduce the fraction \frac{65}{100} to lowest terms by extracting and canceling out 5.
\frac{13}{20}x=\frac{17}{20}\left(2490-x\right)
Reduce the fraction \frac{85}{100} to lowest terms by extracting and canceling out 5.
\frac{13}{20}x=\frac{17}{20}\times 2490+\frac{17}{20}\left(-1\right)x
Use the distributive property to multiply \frac{17}{20} by 2490-x.
\frac{13}{20}x=\frac{17\times 2490}{20}+\frac{17}{20}\left(-1\right)x
Express \frac{17}{20}\times 2490 as a single fraction.
\frac{13}{20}x=\frac{42330}{20}+\frac{17}{20}\left(-1\right)x
Multiply 17 and 2490 to get 42330.
\frac{13}{20}x=\frac{4233}{2}+\frac{17}{20}\left(-1\right)x
Reduce the fraction \frac{42330}{20} to lowest terms by extracting and canceling out 10.
\frac{13}{20}x=\frac{4233}{2}-\frac{17}{20}x
Multiply \frac{17}{20} and -1 to get -\frac{17}{20}.
\frac{13}{20}x+\frac{17}{20}x=\frac{4233}{2}
Add \frac{17}{20}x to both sides.
\frac{3}{2}x=\frac{4233}{2}
Combine \frac{13}{20}x and \frac{17}{20}x to get \frac{3}{2}x.
x=\frac{4233}{2}\times \frac{2}{3}
Multiply both sides by \frac{2}{3}, the reciprocal of \frac{3}{2}.
x=\frac{4233\times 2}{2\times 3}
Multiply \frac{4233}{2} times \frac{2}{3} by multiplying numerator times numerator and denominator times denominator.
x=\frac{4233}{3}
Cancel out 2 in both numerator and denominator.
x=1411
Divide 4233 by 3 to get 1411.