Question

A painter paints 3 rooms in 7 hours. Express y in terms of x, where y is the number of hours the painter takes to paint x rooms.

Answer 1

`y=(7)/(3)x`

Explanation:

Let

x-----> the number of rooms

y----> the number of hours

we know that

using proportion

`(x)/(y)=(3)/(7) \\ \\3y=7x\\ \\y=(7)/(3)x`