Question 167911
.15*60+0X=.10(60+X) THE AMOUNT X ADDED HAS NO IODINE JUST WATER. 
9=6+.1X
.1X=9-6
.1X=3
X=3/.1
X=30 ML OF WATER IS NEEDED.
PROOF:
.15*60=.10(60+30)
9=.10*90
9=9