document.write( "Question 28692: How much pure alcohol must a nurse add to 8cc of a 70% solution to strengthen it to a 90% solution? Just need to know if this is right and if not what is right. \r
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document.write( ".90(8)+ 0(x) = .70(x+8)\r
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document.write( "7.2 = .70x+5.6\r
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document.write( "1.6 = 70x\r
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document.write( "2.29c = x \n" );
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Algebra.Com's Answer #374751 by baseballkid35(2)![]() ![]() ![]() You can put this solution on YOUR website! .90(8)+ 0(x) = .70(x+8) \n" ); document.write( "7.2 = .70x+5.6 \n" ); document.write( "1.6 = 70x \n" ); document.write( "2.29c = x\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "First you take .90 and multiply it by 8, as you see you get 7.2. Than you subtract 0x from .70 and get .70+(x+8). Than you distribute, 7.2=.70x+5.6 and than you subtract 5.6 from 7.2 and get 1.6=.70x. And finally you divide 1.6 by .70 and get 2.285 and if you round that up you will get 2.29c=x \n" ); document.write( " |