Question 1129595

Assuming Bart sells {{{x}}} cars, then Steve sells {{{3x}}} cars

if over the past year, they sold {{{640}}} cars, we have 


{{{x+3x=640}}} 

{{{4x=640}}} 

{{{x=640/4}}} 

{{{x=160}}} ->Bart sells {{{160}}} cars

then, {{{3x=3*160=480}}}   Steve sells {{{480}}} cars