Question

Bernie counted the cars and motorcycles that passed his house in 45 minutes. He counted 26 vehicles and 88 tires. How many motorcycles passed his house?

Answer 1

let
x=#cars
y=# of motorcycles
"He counted 26 vehicles" means
x+y=26
"and 88 tires" means
4x+2y=88

so solve the system
x + y=26
4x+2y=88
for y and you have your answer