document.write( "Question 297117: how many liters of 40% solution has to be added to 10 leiters of 80% to make 60%?
\n" ); document.write( "I need linier equations with 2 viariables to solve \n" ); document.write( "

Algebra.Com's Answer #213970 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"x\"$ = liters of 40% solution needed
\n" ); document.write( "Let $\"y\"$ = liters of 60% solution you end up with
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"y+=+x+%2B+10\"$
\n" ); document.write( "(2) $\"%28.4x+%2B+.8%2A10%29%2Fy+=+.6\"$
\n" ); document.write( "-------------------------------------
\n" ); document.write( "from (2),
\n" ); document.write( "(2) $\".4x+%2B+.8%2A10+=+.6y\"$
\n" ); document.write( " $\"6y+=+4x+%2B+80\"$
\n" ); document.write( "-----------------------
\n" ); document.write( " $\"y+=+%282%2F3%29%2Ax+%2B+40%2F3\"$
\n" ); document.write( "and
\n" ); document.write( " $\"y+=+x+%2B+10\"$ answers
\n" ); document.write( "--------------------------
\n" ); document.write( "check answers:
\n" ); document.write( " $\"%282%2F3%29%2Ax+%2B+40%2F3+=+x+%2B+10\"$
\n" ); document.write( " $\"2x+%2B+40+=+3x+%2B+30\"$
\n" ); document.write( " $\"x+=+10\"$
\n" ); document.write( "and, since
\n" ); document.write( " $\"y+=+x+%2B+10\"$
\n" ); document.write( " $\"y+=+20\"$
\n" ); document.write( "(2) $\"%28.4x+%2B+.8%2A10%29%2Fy+=+.6\"$
\n" ); document.write( "(2) $\"%28.4%2A10+%2B+.8%2A10%29%2F20+=+.6\"$
\n" ); document.write( " $\"%284+%2B+8%29%2F20+=+.6\"$
\n" ); document.write( " $\"12%2F20+=+.6\"$
\n" ); document.write( " $\"12+=+12\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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