document.write( "Question 193338: PROBLEM:
\n" ); document.write( "A chemist needs 900 millileters of a 40% acid solution for a chemistry experiments. The chemist combines x milliliters of a 20% acid solution and y milliliters of a 70% acid solution to make 40% acid solution.
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Algebra.Com's Answer #145134 by Mathtut(3670)\"\" \"About 
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let x be the amount of 20% solution and y be the amount of 70% solution
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\n" ); document.write( "x+y=900...........eq 1
\n" ); document.write( ".2x+.7y=.4(900)...eq 2
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