Question 718068
X+Y=51
X=51-Y
39X+(88/3)Y=1641
39(51-Y)+29.33Y=1641
1989-39Y+29.33Y=1641
-9.67Y=1641-1989
-9.67Y=-348
Y=-348/-9.67
Y=36 3 VOLUME SETS WERE BOUGHT.
X+36=51
X=51-36
X=15 SINGLE VOLUME WERE BOUGHT.
PROOF:
39*15+(88/3)36=1641
585+88*12=1541
585+1056=1541
1641=1641