document.write( "Question 1136821: a 50 pound bag of a cement-sand mixture is 40% sand. How many pounds of pure 100% sand must be added for the resulting mixture to be 60% sand \n" ); document.write( "

Algebra.Com's Answer #754671 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!
p pounds of pure sand to add\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "-
\n" ); document.write( " $\"40%2A50%2B100%2Ap=60%28p%2B50%29\"$
\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( " $\"4%2A50%2B10p=6p%2B300\"$
\n" ); document.write( " $\"200%2B4p=300\"$
\n" ); document.write( " $\"4p=100\"$
\n" ); document.write( " $\"highlight%28p=25%29\"$ \n" ); document.write( "

\n" );