Question

Solve for x.

Question 13 options:

A)

14

B)

8

C)

5

D)

10

Answer 1

Explanation:

The correct answer is C.

`(5x)/(5x+10) =(20)/(20+8)` ⇒
`(5x)/(5x+10) =(20)/(28) =(5)/(7)` ⇒ 35x=25x+50⇒ 10x=50x ⇒ x=5