SOLUTION: How much salt must be added to 80 pounds of a 5% salt solution to make a 24% salt solution?

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Question 492778: How much salt must be added to 80 pounds of a 5% salt solution to make a 24% salt solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How much salt must be added to 80 pounds of a 5% salt solution to make a 24% salt solution?
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Equation:
salt + salt = salt
0.05*80 + x = 0.24(80+x)
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Multiply thru by 100 to get:
5*80 + 100x = 24*80 + 24x
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76x = 19*80
x = 20 lbs (amt of salt needed)
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Cheers,
Stan H.