Question 275795
Beth wants to make 11.6 fl. oz. of a 45% acid solution by mixing together a 22% acid solution and a 80% acid solution. How much of each solution must she use?


Let the 22% solution required be x

The total required = 11.6 oz

22%------------------80%-----------45%  strength

x--------------------11.6-x---------11.6  Quantity

0.22x+0.8(11-x) = 0.45*11.6

0.22x+8.8-0.8x=5.22

-0.58x==-3.58

x=-3.58/-0.58
 = 6.17 oz  of 22% acid


11.6-6.17 = 5.43 oz