Question 48573
DEFINITION:
Let x = amount of solution needed.
Leap of common sense... how much of solution y is therefore needed? Answer is "the rest of the 60litres", so we have (60-x).


BEFORE:
0.02*x + 0.06(60-x)


AFTER:
0.32*60


and the before must equal the after surely? :-) so...
0.02*x + 0.06(60-x) = 0.032*60
0.02x + 3.6-0.06x = 1.92
-0.04x = -1.68
x = (-1.68)/(-0.04)
x = 42 litres.


And so 60-42 is 18.


x=42litres
y=18 litres


jon.