Question

If (4x + 3y) : (3x + 5y) = 6 : 7, find :

(i) x : y

(ii) x, if y = 10

(iii) y, if x = 27

Answer 1

(i) 7x (4x + 3y) = 6x (3x + 5y)

28x + 21y = 18x + 30y

28x - 18x = 30y -21y

10x = 9y

x/y =9y

So, x : y = 9 : 10