document.write( "Question 1152931: A scientist wants to dilute 400 mL of a 16% saline solution to a 10% saline solution by adding water. How much water is needed? \r
\n" ); document.write( "\n" ); document.write( "I am confused on how to set up the equation for the problem as i keep getting a negative number. The answer is 240 mL i just am unsure how to get there. Thank you!
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Algebra.Com's Answer #775042 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
400*0.16, represents amount of solute starting.\r
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\n" ); document.write( "\n" ); document.write( "400+v, the amount of finished solution upon mixing in v mL.\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28%28400%2A0.16%29%2F%28400%2Bv%29=0.10%29\"---------------the addition of v mL. of water must bring saline concentration to 10%.
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