A book shop has a mail-order service. One has to send the price of the books and 20 rupees postage. To get a book priced 150 rupees, how much should one send? If one sends 200 rupees, he would get books worth how much?
If we use b for the price of books and s for the postage, in what all ways can we write the relation between these amounts?
A book shop has a mail-order service. One has to send the price of the books and 20 rupees postage. To get a book priced 150 rupees, how much should one send? If one sends 200 rupees, he would get books worth how much?
If we use b for the price of books and s for the postage, in what all ways can we write the relation between these amounts?
Price of a book = Rs 150
Price of the postage = Rs 20
Total amount to be sent for a book priced Rs 1500 = Rs 150 + Rs 20
= Rs 170
If a person sends Rs 200, the worth of books received by him = Rs 200 − Rs 20
= Rs 180
If the price of the book and postage are denoted by b and s respectively, then the relation between these amounts can be written as follows:
Money to be send = b + s
⇒ b = Money to be send − s
⇒ s = Money to be send − b
Price of a book = Rs 150
Price of the postage = Rs 20
Total amount to be sent for a book priced Rs 1500 = Rs 150 + Rs 20
= Rs 170
If a person sends Rs 200, the worth of books received by him = Rs 200 − Rs 20
= Rs 180
If the price of the book and postage are denoted by b and s respectively, then the relation between these amounts can be written as follows:
Money to be send = b + s
⇒ b = Money to be send − s
⇒ s = Money to be send − b
