document.write( "Question 966164: Hi I'm having trouble solving word problems so if you can help me out with these it would be greatly appreciated. Thanks!
\n" ); document.write( "1) How much of a 4% acid solution should be mixed with a 12% acid solution to produce an 800ml of a 7% acid solution?
\n" ); document.write( "2) How much of an 8% saline solution should be added to 600 ml of a 3% solution to produce a 5% solution? \n" ); document.write( "
Algebra.Com's Answer #590585 by ankor@dixie-net.com(22740)\"\" \"About 
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1) How much of a 4% acid solution should be mixed with a 12% acid solution to produce an 800ml of a 7% acid solution?
\n" ); document.write( "let x = amt of 4% solution
\n" ); document.write( "The total is to b 800 ml therefore
\n" ); document.write( "(800-x) = amt of 12% solution
\n" ); document.write( "Mixture equation in decimal form
\n" ); document.write( ".04x + .12(800-x) = .07(800)
\n" ); document.write( ".04x + 96 - .12x = 56
\n" ); document.write( ".04x - .12x = 56 - 96
\n" ); document.write( "-.08x = -40
\n" ); document.write( "x = -40/-.08
\n" ); document.write( "x = 500 ml of 4% solution
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\n" ); document.write( "Check this, 12% has to 300 ml
\n" ); document.write( ".04(500) + .12(300) = 56
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\n" ); document.write( "2) How much of an 8% saline solution should be added to 600 ml of a 3% solution to produce a 5% solution?
\n" ); document.write( "Here is the equation for this, you should be able to solve it
\n" ); document.write( "x = 8% solution amt
\n" ); document.write( ".08x + .03(600) = .05(x+600) \n" ); document.write( "
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