Question 129992
P+J=80 OR P=80-J
3.5P+4J=305
3.5(80-J)+4J=305
280-3.5J+4J=305
.5J=305-280
.5J=25
J=25/.5
J=50 NUMBER OF JUNIOR BALLS BOUGHT.
80-50=30 NUMBER OF PONY BALLS BOUGHT.
PROOF:
3.5*30+4*50=305
105+200=305
305=305