SOLUTION: a shop sells bicycles and tricycles. there are a total of 20 cycles and there are 50 wheels. how many bicycles are there?

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Question 415886: a shop sells bicycles and tricycles. there are a total of 20 cycles and there are 50 wheels. how many bicycles are there?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
b+t=20 t=20-b
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2b+3t=50
2b+3(20-b)=50
2b+60-3b=50
-b=-10
b=10
t=10