document.write( "Question 549907: How much pure water must be mixed with 3 pints of 70% developer to produce a mixture that is 29% developer? \r
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document.write( "I have done this such a long time ago, I do not remember how to do it now. Please help! \n" );
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Algebra.Com's Answer #358182 by ankor@dixie-net.com(22740) You can put this solution on YOUR website! How much pure water must be mixed with 3 pints of 70% developer to produce a mixture that is 29% developer? \n" ); document.write( ": \n" ); document.write( "Let x = amt of water required \n" ); document.write( ": \n" ); document.write( ".7(3) = .29(x+3) \n" ); document.write( "2.1 = .29x + .87 \n" ); document.write( "2.1 - .87 = .29x \n" ); document.write( "1.23 = .29x \n" ); document.write( "x = 1.23/.29 \n" ); document.write( "x = 4.24 pints of water required \n" ); document.write( ": \n" ); document.write( "Check this by finding the amt of developer in each mixture, should be the same \n" ); document.write( ".7(3) = .29(3+4.24) \n" ); document.write( "2.1 = .29(7.24) \n" ); document.write( "2.1 = 2.1; confirms our answer of 4.24 pts of water \n" ); document.write( " \n" ); document.write( " |