Question 142639
136X+81(31-X)=3391
136X+2511-81X=3391
55X=3391-2511
55X=880
X=880/55
X=16 IS THE NUMBER OF HEAVY EQUIPMENT OPERATORS.
31-16=15 IS THE NUMBER OF LABORERS.
PROOF:
136*16+81*15=3391
2176+1215=3391
3391=3391