A part of monthly expenses of a family is constant and the remaining vary with the number of members in the family. For a family of 4 person, the total monthly expenses are Rs 10,400 whereas for a family of 7 persons, the total monthly expenses are Rs 15,800. Find the constant expenses per month and the monthly expenses of each member of a family.
Subtracting equation (1)
From (2), we get 3x=5400=>x=1800
Substituting x=1800 in the equation (1), we get 4(1800)+y=10400=>y=3200
Hence, constant expenses =Rs3200 and expenditure per person =Rs.1800