Question

Find r if 5pr= 26Pr-1​

Answer 1

Step-by-step explanation:

$5pr = 26pr - 1 \\ or \: \: \: \: \: 5pr - 26pr = - 1 \\ or \: \: \: \: \: - 21pr = - 1 \\ or \: \: \: \: \: 21pr = 1 \\ so \: \: \: \: pr = \frac{1}{21} \\ so \: \: \: \: r = \frac{1}{21p}$

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Answer 2

Answer:

r=3 or 10 Hope it helps u