Question 41399
Let x be the amount of solution:
EQUATIONL
0.1x+0.04(7-x)=0.06(7)
0.1x+0.28-0.04x=0.42
0.06x=0.14
x=2.3
7-2.3=4.7
Hence, about 2.3 L of 10% should be added and about 4.7 of 4% should be added.
Paul.