If 15% of (2x + 3y) = 25% of (4x - 3y), then what is x : y?

12 : 7

15% of (2x + 3y) = 25% of (4x - 3y)

 \(\frac{15}{100}\) × (2x + 3y) =  \(\frac{25}{100}\) × (4x - 3y)

 \(\frac{3}{20}\) × (2x + 3y) =  \(\frac{1}{4}\) × (4x - 3y)

\(\frac{3}{5}\) × (2x + 3y) =  (4x - 3y)

6x + 9y = 20x - 15y

14x = 24y

x : y = 12 : 7

The correct answer is Option (3) → 12 : 7