document.write( "Question 432958: how many liters of a 40% salt solution must be added to 4 liters of a 10% salt solution to obtain 30% solution?\r
\n" ); document.write( "\n" ); document.write( "iam good at solving problems, I just have trouble setting them up. I honestly am not sure where to start on this problem.
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Algebra.Com's Answer #300089 by mananth(16949)\"\" \"About 
You can put this solution on YOUR website!
------ Percent ---------------- quantity
\n" ); document.write( "salt solution 10 ----------------4
\n" ); document.write( "salt solution 40 ----------------x
\n" ); document.write( "Total 30 ----------------4+x
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\n" ); document.write( "10*4+40*x=30(4+x)
\n" ); document.write( "40+40x= 120+30x
\n" ); document.write( "40x-30x=120-40
\n" ); document.write( "10x=80
\n" ); document.write( "/10
\n" ); document.write( "x=8 liters 40%salt solution
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