The ratio of income and expenditure of my friend is 5 : 2. His savings are ₹15,000. His expenditure breakdown is as follows: (x + 7.5)% on…

The ratio of income and expenditure of my friend is 5 : 2. His savings are ₹15,000. His expenditure breakdown is as follows: (x + 7.5)% on food, (x + 2)% on entertainment, (x + 5.5)% on rent and the remaining on children’s education. If he spends ₹4,000 on children’s education, find the value of x.