Question

3. The value of x varies directly with y,

and when x = 21, y=3.
Find the value of x if y= 10.

Answer 1

70

Explanation:

First you want to find the amount of x per 1 y so you divide 21 by 3 to get when x = 7 y = 1. Now you can just multiply 10 by 7 to get 70.

I hope this helps!