document.write( "Question 388458: I am questioning if there is enough information to solve this problem:How much water should be added to 77 units of a 37% salt solution to get a 30% salt solution?
\n" ); document.write( "Thank you
\n" ); document.write( "Janet \n" ); document.write( "

Algebra.Com's Answer #274749 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
How much water should be added to 77 units of a 37% salt solution to get a 30% salt solution?
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\n" ); document.write( "Equation:
\n" ); document.write( "water + water = water
\n" ); document.write( "0.63*77 + x = 0.70(77+x)
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\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "63*77 + 100x = 70*77 + 70x
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\n" ); document.write( "30x = 7*77
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\n" ); document.write( "x = 17.97 units (# of units of water that are needed for the mixture)
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\n" ); document.write( "You could also do the problem using the following idea:
\n" ); document.write( "salt + salt = salt
\n" ); document.write( "0.37*77 + 0*x = 0.30(77+x)
\n" ); document.write( "37*77 + 0 = 30*77+30x
\n" ); document.write( "7*77 = 30x
\n" ); document.write( "x = 7.77
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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