the soccer team collected $800 at a car wash fundraiser. They charged $5.00 for small vehicles and $10.00 for larger vehicles. The amount collected can be modeled by the equation 5x + 10y = 800, where x represents the number of small vehicles and y represents the number of larger vehicles. If the number of larger vehicles washed was 50, how many small vehicles were washed in total?
5x+10y = 800 replace y by 50:  5x+10(50) = 800               5x+500 = 800               5x = 800-500               5x = 300               x = 300/5               x = 60 60 small vehicles were washed in total.
proof: 5x+10y = 800 replace x=60 and y=50 Â Â Â Â so; 5(60) +10(50) =800 Â Â Â Â Â Â Â 300 + 500 = 800 Â Â Â Â Â Â Â Â Â Â Â 800 = 800
