document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202656>Question 1202656</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much 9% saline solution should Kent mix with 70 cubic centimeters (cc) of a 17% saline solution to produce a 13% saline solution?  </SPAN>\n" );
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document.write( "x = amount of the 9% saline solution in cubic centimeters (cc)<BR>\n" );
document.write( "0.09x = amount of pure saline from the 9% solution.\r<BR>\n" );
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document.write( "Add on 70*0.17 = 11.9 more ccs of pure saline to get 0.09x+11.9 ccs of total pure saline.\r<BR>\n" );
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document.write( "Let A = 0.09x+11.9 to represent this quantity.\r<BR>\n" );
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document.write( "B = total amount of solution<BR>\n" );
document.write( "B = x + 70\r<BR>\n" );
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document.write( "A/B = concentration of saline<BR>\n" );
document.write( "(0.09x+11.9)/(x + 70) = 0.13\r<BR>\n" );
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document.write( "Let's solve for x<BR>\n" );
document.write( "(0.09x+11.9)/(x + 70) = 0.13<BR>\n" );
document.write( "0.09x+11.9 = 0.13(x + 70)<BR>\n" );
document.write( "0.09x+11.9 = 0.13x + 9.1<BR>\n" );
document.write( "0.09x-0.13x = 9.1-11.9<BR>\n" );
document.write( "-0.04x = -2.8<BR>\n" );
document.write( "x = -2.8/(-0.04)<BR>\n" );
document.write( "x = 70\r<BR>\n" );
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document.write( "Answer: <font color=red>70 ccs</font> of the 9% saline solution. <BR>\n" );
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