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10x\left(1-0.85\right)=\left(x-20000\right)\left(1-0.35\right)
Multiply both sides of the equation by 25000, the least common multiple of 2500,25000.
10x\times 0.15=\left(x-20000\right)\left(1-0.35\right)
Subtract 0.85 from 1 to get 0.15.
1.5x=\left(x-20000\right)\left(1-0.35\right)
Multiply 10 and 0.15 to get 1.5.
1.5x=\left(x-20000\right)\times 0.65
Subtract 0.35 from 1 to get 0.65.
1.5x=0.65x-13000
Use the distributive property to multiply x-20000 by 0.65.
1.5x-0.65x=-13000
Subtract 0.65x from both sides.
0.85x=-13000
Combine 1.5x and -0.65x to get 0.85x.
x=\frac{-13000}{0.85}
Divide both sides by 0.85.
x=\frac{-1300000}{85}
Expand \frac{-13000}{0.85} by multiplying both numerator and the denominator by 100.
x=-\frac{260000}{17}
Reduce the fraction \frac{-1300000}{85} to lowest terms by extracting and canceling out 5.