Sara went to the park and saw that there were a total of 15 bicycles and tricycles. If the total number of wheels was 39, how many tricycles were there?

Question

bi = 2 wheels
tri = 3 wheels

Please help me, I'm really struggling with this problem

Answer 1

I don't remember the easiest way to do this -- so I tried trial and error.

6 bikes and 9 trikes

Answer 2

15 x 6 = 30 wheels
3 x 9 = + 9 wheels
________________________
12 39

am i correct????

btw --- what's trial and error???? I don't remember learning this last year.

Answer 3

I don't understand your arithmetic above. I gave you the answer.

Trial and error means trying different combinations of numbers until you find the answer.

6 bikes = 12 wheels
9 trikes = 27 wheels

Answer 4

Thank You! :)