If x : y = 4 : 5, then the value of (8x - 6y) : (9x - 7y) is :
Answer & explanation
Correct answer: option 1
x : y = 4 : 5
Let x = 4, y = 5
On putting values, we get,
(8x - 6y) : (9x - 7y) = (8 × 4 - 6 × 5) : (9 × 4 - 7 × 5)
= (32 - 30) : (36 - 35)
= 2 : 1
So, (8x - 6y) ∶ (9x - 7y) = 2 : 1