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

Question

asked Jul 3, 2021 87.5k views

1 Answer

Mdonati · Answer 1 · 2021-07-09T08:38:54+0000

Answer:

-1/7=n

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