If a person takes a surfing lesson and goes parasailing, she will pay $175.
x: cost of parasailing
y: cost of surfing
x + y = 175
Parasailing: 16 people
Surfing: 20 people
Total collected : $3,101
16x+20y=3,101
We have a system of equations:
16x+20y=3,101 (a)
x + y = 175 (b)
If we multiply equation b by 16 and subtract it to equation a:
16x+20y=3,101
-
16x+16y= 2,800
____________
4y = 301
Solve for y:
y= 301/4
y= 75.25
Replace y=75.25 on any equation:
x + y = 175
x+75.25 =175
Solve for x:
x=175-72.25
x = 99.75
Cost of parasailing: $99.75
Cost of surfing: $75.25