SOLUTION: A total of 28 bikes have 64 wheels. Some have 2 wheels and some have 3. How many have three wheels?

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Question 74508: A total of 28 bikes have 64 wheels. Some have 2 wheels and some have 3. How many have three wheels?
Answer by josmiceli(9817) About Me  (Show Source):
You can put this solution on YOUR website!
x = number of 3-wheel bikes
28-x = number of 2 wheel bikes
3x+%2B+2%2828-x%29+=+64
3x+%2B+56+-2x+=+64
x+=+8 answer
check
3x+%2B+2%2828-x%29+=+64
3%2A8+%2B+2%2A20+=+64
24+%2B+40+=+64
64+=+64
OK