SOLUTION: How much salt must be added to 800g of a solution that is 15% to obtain a solution that is 20% salt?

Algebra ->  Finance -> SOLUTION: How much salt must be added to 800g of a solution that is 15% to obtain a solution that is 20% salt?      Log On


   

Question 1127567: How much salt must be added to 800g of a solution that is 15% to obtain a solution that is 20% salt?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
-------------------------------------------------------------------------------
How much salt must be added to 800g of a solution that is 15% to obtain a solution that is 20% salt?
-------------------------------------------------------------------------------

Add x grams of salt:

%280.15%2A800%2Bx%29%2F%28x%2B800%29=0.20
-
0.15%2A800%2Bx=0.2x%2B0.2%2A800
0.05%2A800=0.8x
x=0.05%2A800%2F0.8
highlight%28x=50%29