Question

21/x =6/8, x is an unknown number what is it?

Answer 1

x=28

Explanation:

21/x = 6/8

21/x = 3/4

84=3x

3x/84

x=28

Answer 2

x = 28

Explanation:

21/
`x` = 6/8

cross multiply: 21 x 8 = 6 x
`x`

Combine like terms: 168 = 6
`x`

Divide both sides by 6: 28 =
`x`