A tricycle has 3 wheels. A bicycle has 2 wheels. 8 tricycles and bicycles have 22 wheels altogether. How many tricycles are there? How many bicycles are there?
b = bikes wheels = 2b
then 8-b - trikes wheels = 3 ( 8-b) summed = 22
2b + 3(8-b) = 22 solve for b then t = 8-b
