document.write( "Question 963159: what volumes of a 2% and 5% solution must be mixed to make 250 gallons of a 2.5% solution. \n" ); document.write( "

Algebra.Com's Answer #588702 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"2X%2B5Y=%285%2F2%29%28250%29\"$
\n" ); document.write( "2. $\"X%2BY=250\"$
\n" ); document.write( "Multiply eq. 2 by -2 and add to eq. 1,
\n" ); document.write( " $\"2X%2B5Y-2X-2Y=625-500\"$
\n" ); document.write( " $\"3Y=125\"$
\n" ); document.write( " $\"Y=125%2F3\"$ <--- gallons of 5% solution
\n" ); document.write( "Then,
\n" ); document.write( " $\"X%2B125%2F3=750%2F3\"$
\n" ); document.write( " $\"X=625%2F3\"$ <--- gallons of 2% solution\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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