SOLUTION: how many liters of a 40% salt solution must be added to 4 liters of a 10% salt solution to obtain 30% solution?
iam good at solving problems, I just have trouble setting them up
Algebra.Com
Question 432958: how many liters of a 40% salt solution must be added to 4 liters of a 10% salt solution to obtain 30% solution?
iam good at solving problems, I just have trouble setting them up. I honestly am not sure where to start on this problem.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
------ Percent ---------------- quantity
salt solution 10 ----------------4
salt solution 40 ----------------x
Total 30 ----------------4+x
10*4+40*x=30(4+x)
40+40x= 120+30x
40x-30x=120-40
10x=80
/10
x=8 liters 40%salt solution
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