1 worker \(=x\)
2 worker \(= \frac{worker1}{2}= \frac{x}{3}\)
3 worker \(= \frac{worker1}{3}= \frac{x}{3}\)
so:
\(66=x+ \frac{x}{3}+ \frac{x}{2}\)
\(66=x+\frac{2x}{6}+ \frac{3x}{6}\)
\(66*6=6x+2x+3x\)
\(396=11x\)
\(x=36\)
so:
worker \(1\) sorted \(36\) boxes
worker \(2\) sorted \(18\) boxes
worker \(3\) sorted \(12\) boxes