Question

How do you solve `4/5x =10/20`?

Answer 1

`color(blue)(x = (1 * 5) / (2 * 4) = 5/8`

Explanation:

`4/5 x = 10 / 20`

`x = ((10/20)) / (4/5)), " cross multiplying"`

`x = (10 / 20) * (5/4)`

`x = (cancel10 * 5) / (cancel(20)^color(red)(2) * 4)`

`color(blue)(x = (1 * 5) / (2 * 4) = 5/8`