No Cold Food For X Months
The Daniels family are planning to buy a new refrigerator. The cash price of the one they have chosen is $131.50. They could buy it on the installment plan, but it would cost more. They have already saved $19. They will try to save $15 a month until they have enough to pay the full amount. At this rate, for how many months must they save to buy the refrigerator?
Source: The New Trend Arithmetic, 1942