There 7 seats 19 wheels how many bikes and trikes are there

Answer 1

b = number of bikes, 2 wheels and 1 seat each

t = number of trikes, 3 wheels and 1 seat each

b + t = 7

2b + 3t = 19

Top equation gives

b = 7 - t

Plug this into bottom equation and get

2(7 - t) + 3t = 19

14 + t = 19

t = 5

Plug this value of t into either equation. Top equation gives

b = 7 - 5 = 2

Test the answers.