Delhi Police Constable Exam Model Paper 8

Incomes of A and B are 4x and 3x
Expenses of A and B are 3y and 2y
Savings of A is 4x - 3y and B is 3x - 2y.
Since the savings of each is the same
$4\mathit{x}-3\mathit{y}=3\mathit{x}-2\mathit{y}\mathit{o}\mathit{r}\mathit{x}=\mathit{y}$
$4\mathit{x}-3\mathit{y}=600$
$4\mathit{x}-3\mathit{x}=600$
$\mathit{X}=600$
Income of $\mathit{A}=600\times 4=2400$