Question

A bike shop sells only skateboards and bicycles. All skateboards have 4 wheels and all bikes have 2 wheels each. There are 20 vehicles with a total of 52 wheels in the shop. How many skateboards and how many bikes were in the shop?

Answer 1

There are 11 skateboards and 9 bikes.

Set up your equations: 4s+2b=52 and b+s=20
Multiply the 2nd by 2, 2b+2s=40
Subtract the second equation from the first
2s=22
so 11 skateboards and 9 bikes