document.write( "Question 61028: Would someone mind taking a look at this question and see if my answer is correct. I think I am on the right track.
\n" ); document.write( "One needs to mix a 30% acid solution with a 50% acid solution to obtain 12 ounces of a 45% acid solution. How many ounces of each of the acid solutions must be used?\r
\n" ); document.write( "\n" ); document.write( "Amt. of mix is 12 oz
\n" ); document.write( "Amt of 1st acid = x
\n" ); document.write( "Amt. of 2nd acid is the rest = 12-x\r
\n" ); document.write( "\n" ); document.write( "Amt. of acid in the mixture = .45(12)
\n" ); document.write( "Amt. of 1st acid = .30x
\n" ); document.write( "Amt. of 2nd acid = .50(12-x)\r
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\n" ); document.write( "\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( "3 oz of 30% acid
\n" ); document.write( "9 oz of 50% acid
\n" ); document.write( "

Algebra.Com's Answer #41962 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
You are right with your answers, and I like your
\n" ); document.write( "approach better than mine, in fact.
\n" ); document.write( "I used two variables where you only used one.
\n" ); document.write( "Amt. of mix is 12 oz
\n" ); document.write( "Amt of 1st acid = x
\n" ); document.write( "Amt. of 2nd acid is the rest = y (you said (12-x))
\n" ); document.write( "Amt. of acid in the mixture = .45(12)
\n" ); document.write( "Amt. of 1st acid = .30x
\n" ); document.write( "Amt. of 2nd acid = .50y
\n" ); document.write( ".30x + .50y = .45*12
\n" ); document.write( "x + y = 12
\n" ); document.write( ".30x + .50(12-x) = .45*12
\n" ); document.write( ".3x + 6 - .5X = 5.4
\n" ); document.write( ".2x = 6 - 5.4
\n" ); document.write( ".2x = .6
\n" ); document.write( "x = 3
\n" ); document.write( "y = 12 - 3
\n" ); document.write( "y = 9\r
\n" ); document.write( "\n" ); document.write( "3 oz of 30% acid
\n" ); document.write( "9 oz of 50% acid
\n" ); document.write( "you are correct
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