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Given p/q = 5/6, q/r = 7/10, and r/s = 9/4, find

(p - q)/(q - r) and (2q - r)/(r + s)

 Feb 12, 2022
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In each of the equations, manipulate it to get just one variable on one side. Plug the expression back into the expressions.

For example, we know that p/q=5/6. Multiplying boths ides by q, this gives \(p=\frac{5q}{6}\). Plugging this back into \(\frac{p-q}{q-r}\) will give \(\frac{\frac{5q}{6}-q}{q-r}.\)

 Feb 12, 2022

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