Question 1205921
A plumber earns $15 per hour more than her apprentice. In each 40-hour week, their combined earnings are $2200. What is the hourly rate for each?

Let hourly rate of plumber be $ x
and that of apprentice be $y

A plumber earns $15 per hour more than her apprentice.

x=y+15...............1

40x +40y=2200...................2

substitute x in eqn 2

40(y+15) +40 y = 2200

80y+600=2200

80y = 2200-600

80y = 1600

y= 20

x=y+15

x = 20+15=35