Working at their respective constant rates, machine A makes 100 copies in 12 minutes and machine B makes 100 copies in 15 minutes. If a number of x machine A and a number of y machine B work simultaneously at their respective rates for 2 hours, what is the total number of copies that they will produce?
1) x = y.
(2) 5x + 4y = 90.![]()
1) x = y.
(2) 5x + 4y = 90.