3 years ago

Need help with question 20

1 answer:

5 0

I would start by dividing by all the multipliers of the parentheses.
$\frac{PV}{nt} = r_{1} +r_{2}$
Then, I would subtract the unwanted variable from the sum.
$\frac{PV}{nt} -r_{2} = r_{1}$

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