A total of $$46$$ bicycles and tricycles are in the garage. If there are $$100$$ wheels in total, there should be~\uline{~~~~~~~~~~}~tricycles in the garage. 
Overseas Competition->Knowledge Point->Word Problem Modules->Chicken-Rabbit Problems->Solving Chicken-Rabbit Problems by Using Hypothesis
$(100-2\times46)\div(3-2)=8$ 