Solve for p
p = \frac{2000}{7} = 285\frac{5}{7} \approx 285.714285714
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0.75p-0.4p=100
Subtract 0.4p from both sides.
0.35p=100
Combine 0.75p and -0.4p to get 0.35p.
p=\frac{100}{0.35}
Divide both sides by 0.35.
p=\frac{10000}{35}
Expand \frac{100}{0.35} by multiplying both numerator and the denominator by 100.
p=\frac{2000}{7}
Reduce the fraction \frac{10000}{35} to lowest terms by extracting and canceling out 5.
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