Question

There are 10 tricycles and bicycles in all.

If there are 23 wheels, how many are bicycles and how many are tricycles?

Answer 1

see below

Explanation:

tricycles = x

bicycles = y

x+y =10 so y=10-x

3x+2y=23

so 3x + 2(10-x) =x+20 =23

so x=3

y = 7