human
Jeff is collecting matchbox cars. He has twice as many cars as trucks. He has 60 total vehicles. How many trucks does he have?
assistant
How many trucks does Jeff have? ** The number of trucks + 2(number of trucks) = 60
How many trucks does Jeff have? ** Therefore 3(number of trucks) = 60
How many trucks does Jeff have? ** Number of trucks = 20 because 60 / 3 = <<60/3=20>>20
#### 20