Question 47444
Mixture questions are all about BEFORE = AFTER since the "BEFORE's" mix to become the "AFTER", so they have to be "equal".


Right, a definition so we know what x is: Let x be the amount of the 10% solution.
Once mixed, how much will we have? we will have (x+6) litres, surely? :-)


BEFORE:
0.04*6 and 0.10x


AFTER:
0.06*(x+6)


So, 0.04*6 + 0.10x = 0.06*(x+6)
0.24 + 0.10x = 0.06x + 0.36
0.24 + 0.04x = 0.36
0.04x = 0.12
x = 0.12/0.04
x = 3litres


jon