Question

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answer with Solution​

Answer 1

1. first cross multiply the whole thing.

4/8= n/7

8x n = 4 x 7

8n = 28

n = 3.5

2. 7/n = 5/2.5

5n = 17.5

n = 3.5

3. 3/3.6 = 4/n

3n = 14.4

n = 4.8

Answer 2

For the first given just solve them using the cross multiplication method and divide 8 in both sides. You may also use this solving for the second and third given.

`1. \begin{gathered} (4)/(8) = (n)/(7) \\ 8n = (4)(7) \\ 8n = 28 \\ \frac{ \cancel{8}n}{ \cancel{8}} = (28)/(8) \\ \sf \bold{n = 3.5}\end{gathered}`

`2. \begin{gathered} (7)/(n) = (5)/(2.5) \\ 5n = (7)(2.5) \\ 5n = 17.5 \\ \frac{ \cancel{5}n}{ \cancel{5}} = (17.5)/(5) \\ \sf \bold{n = 3.5}\end{gathered}`

`3. \begin{gathered} (3)/(3.6) = (4)/(n) \\ 3n = (3.6)(4) \\ 3n = 14.4 \\ \frac{ \cancel{3}n}{ \cancel{3}} = (14.4)/(3) \\ \sf \bold{n = 4.8}\end{gathered}`

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