document.write( "Question 576574: How many cups of a 18% salt solution must be added to 16 cups of a 25% salt solution to get a 20% salt solution? \r
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document.write( "a. 20 cups
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document.write( "b. 30 cups
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document.write( "c. 40 cups
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document.write( "or
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document.write( "d. 55.5 cups \n" );
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Algebra.Com's Answer #369897 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! How many cups of a 18% salt solution must be added to 16 cups of a 25% salt solution to get a 20% salt solution? \n" ); document.write( "a. 20 cups \n" ); document.write( "b. 30 cups \n" ); document.write( "c. 40 cups \n" ); document.write( "or \n" ); document.write( "d. 55.5 cups \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "salt + salt = salt \n" ); document.write( "0.18x + 0.25*16 = 0.20(x+16) \n" ); document.write( "---- \n" ); document.write( "Multiply thru by 100 to get: \n" ); document.write( "18x + 25*16 = 20x + 20*16 \n" ); document.write( "2x = 5*16 \n" ); document.write( "x = 40 cups (# of cups of 18% solution) \n" ); document.write( "---- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "======== \n" ); document.write( " |