Question 279044
Anjali wants to make 10.5 qt. of 50% sugar solution by mixing together a 70% sugar solution and a 10% sugar solution. How much of each solution must she use?

Let 10% soln be x

70*sol will be 10.5 -x

10%---------------------70%------------------50%

x-----------------------10.5-x ---------------10.5 qt.

0.1x+ 0.7(10.5-x)=0.5*10.5

0.1x+7.35-0.7x=5.25

-0.6x=-2.1
x=3.5 qt of 10% solution

10.5 - 3.5 = 7 qt of 70% solution