Question

annual incomes of A and B are in ratio 4 is to 3 and their expenses are in ratio 3 is to 2 if each of them saves rupees 1200 at the end of the year find the annual income of each

Answer 1

chapter pairs of linear equation in two variables
ATQ
$\frac{x}{y} = \frac{4}{3}$
$\frac{x}{y} = \frac{3}{2}$
so
income - expenditure = saving
for a
3x-2y=1200
and
FOR B
4x - 3y = 1200
after solving the equation we get
x=1200
y=1200
income of A
3(1200)=3600
income of B
4(1200)=4800
sorry for taking long time ;)