Company has to buy computers and printers.  each computer, X, costs $585 each printer, Y, costs $350. If the company spends $5610 and buys a total of 12 machines, how many of each did it buy?

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.