Question

Assume y varies directly as x.

If x = 14 when y=4,
find x when y = 2.
Hint: 14/4 = x/2

Answer 1

soln

let x=n in order to differentiate btn x and multiplication sign.

first of all we apply cross multiplication.

14/4×n/2

(4×n)=(14×2)

open blacket

4n=28

we divide by 4 both side

n=7

therefore

x=7