Question 869819
Since she counts 40 seats, and each bicycle has one seat, 40 seats = 40 bikes
The total number of wheels is 95.
Let x = the number of bicycles (2 wheels); then 40-x = the number of tricycles (3 wheels)
We can write an equation for the number of wheels:
2x + 3(40-x) = 95
Solve for x:
2x + 120 - 3x = 95
x = 25
So there are 25 bicycles and 15 tricycles