Question

5

Given that
5x : 8= 7:2
Calculate the value of x.
Give your answer in its simplest form.
X =

Answer 1

x=5.6

Explanation:

5x : 8 = 7 : 2

5x × 2 = 8 × 7

5x=
`(56)/(2)`

5x = 28

X = 5.6

Answer 2

x = 28/5

Explanation:

We can use proportions to solve

5x 7

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

8 2

Using cross products

5x*2 = 7 * 8

10x = 56

Divide by 10

10x/10 = 56/10

x = 28/5