Question

please solve above equation answer should come u=90.
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Answer 1

Step-by-step explanation:

here we can cross multiply the equation to find the value of u, after solving it u can get u=90

Answer 2

Answer:

$60 = \frac{120}{ \frac{90}{u} + 1} \\ 60 = 120 \div ( \frac{90}{u} + 1) \\ 60 \times ( \frac{90}{u } + 1) = 120 \\ \frac{5400}{u } + 60 = 120 \\ \frac{5400}{u } = 120 - 60 \\ 5400 = 60u \\ \frac{5400}{60} = u \\ 90 = u$