SOLUTION: A 30% solution of barium chloride is mixed with 10 grams of water to form a 20% solution. How many grams of the original solution did we start with? A)10 B)15 c)20 D)25 E)30

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Question 616523: A 30% solution of barium chloride is mixed with 10 grams of water to form a 20% solution. How many grams of the original solution did we start with?
A)10
B)15
c)20
D)25
E)30
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A 30% solution of barium chloride is mixed with 10 grams of water to form a 20% solution

Let x represent grams of solution started with

Note: Using %Water = %Water

 .70x + 10 = .80(x+10)

     (10-8)/.1 = x = 20, the grams of solution started with