Question 456877
------	percent	----------------	quantity										
Acid	15	----------------75	ml							
water	0	----------------x	ml							
Total	10	----------------75+x	ml							
													
15*75+0*x=10(75+x)
													
1125=750+10x					
													
-10x=750-1125					
													
-10x=-375										
													
/-10											
													
x=37.5	ml water