Question 1203904
<br>
Probably a formal algebraic solution was wanted....<br>
But you can get good problem-solving practice by solving this problem informally, using logical reasoning and simple arithmetic.<br>
If all cycles were bicycles, the number of wheels would be 45*2 = 90.  But the number of wheels is 133, which is 133-90 = 43 more.<br>
Since each tricycle has 1 more wheel than each bicycle, the number of tricycles must be 43.<br>
ANSWER: 43<br>