Question 1008886
RT=J relates rate, time, job or task.


Each person takes bricks at the same rate as any other person.


Let r be rate for one person;
let j be the unknown amount of bricks;
{{{system(3r*3=3000,6r*6=j)}}}


{{{r=3000/(3*3)}}}
-
{{{j=6*6*r}}}
{{{j=6*6*(3000/(3*3))}}}
{{{highlight(j=12000)}}},  this many bricks.