document.write( "Question 725231: determine the number of gallons of a 15% acid solution, 75% acid solution, and a 60% acid solution that are required to make 100 gallons of 51% acid,IF the sum of three times the number of gallons of a 15% acid solution and a 75% acid solution is thirty more than the number of gallons of 60%? \n" ); document.write( "
Algebra.Com's Answer #444040 by josgarithmetic(39617)\"\" \"About 
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x = amount of 15% acid material
\n" ); document.write( "y = amount of 60% acid material
\n" ); document.write( "z= amount of 75% acid material\r
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\n" ); document.write( "\n" ); document.write( "\"3x%2Bz=30%2By\"
\n" ); document.write( "AND
\n" ); document.write( "\"x%2By%2Bz=100\"
\n" ); document.write( "AND
\n" ); document.write( "\"%2815x%2B60y%2B75z%29%2F100=51\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Use those equations as a system and solve for x, y, and z.
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