math
posted by Fred .
last weekend, I went to play the nearby park. It was real fun! I rode my new bicycle tat Mom had gifted me on my birthday. On reaching the park, I saw that there were a total of 15 bicycles and tricycles. if the total number of wheels was 35, how many tricycles are there?

let the number of bikes be x
then the number of trikes must be 15x
solve
2x + 3(15x) = 35
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