Question

A computer and printer cost a total of 1240 . The cost of the computer is three times the cost of the printer. Find the cost of each item.

Answer 1

Answer: The printer costs 310 and the computer costs 930.

Explanation:

p = printer

c = computer

p + c = 1240 <- their combined total is 1240

c = 3p <- a computer costs 3 times the amount of a printer

p + 3p = 1240 <- substitute c for 3p

4p = 1240

p = 310 <- cost of printer

c = 3*310 <- substitute into the 2nd equation

c = 930

930 + 310 = 1240 <- double check