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25-04-2020
Mathematics

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solve the proportion by using cross product: 5/n+3 = 7/4

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wegnerkolmp2741o wegnerkolmp2741o

25-04-2020

Answer:

-1/7=n

Step-by-step explanation:

We can use cross products to solve

5 7

-------- = ------

n+3 4

5*4 = 7*(n+3)

20 = 7*(n+3)

Distribute

20 = 7n+21

subtract 21 from each side

20-21 = 7n+21-21

-1 = 7n

Divide each side by 7

-1/7 = 7n/7

-1/7=n

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