document.write( "Question 1074171: How much soil with 10% sand do you
\n" ); document.write( "need to add to 0.5 ydł of soil with 40%
\n" ); document.write( "sand in order to make a soil with 16%
\n" ); document.write( "sand? \n" ); document.write( "

Algebra.Com's Answer #688891 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = cubic yds of soil with 10% sand
\n" ); document.write( " $\"+.1x+\"$ = cubic yds of sand in the 10% soil
\n" ); document.write( " $\"+.4%2A.5+=+.2+\"$ yd3 of sand in the 40% soil
\n" ); document.write( "-------------------------------------------
\n" ); document.write( " $\"+%28+.1x+%2B+.2+%29+%2F+%28+x+%2B+.5+%29+=+.16+\"$
\n" ); document.write( " $\"+.1x+%2B+.2+=+.16%2A%28+x+%2B+.5+%29+\"$
\n" ); document.write( " $\"+.1x+%2B+.2+=+.16x+%2B+.08+\"$
\n" ); document.write( " $\"+.06x+=+.12+\"$
\n" ); document.write( " $\"+x+=+2+\"$
\n" ); document.write( "----------------
\n" ); document.write( "2 cubic yds of soil with 10% sand needs to be added
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+.1x+%2B+.2+%29+%2F+%28+x+%2B+.5+%29+=+.16+\"$
\n" ); document.write( " $\"+%28+.1%2A2+%2B+.2+%29+%2F+%28+2+%2B+.5+%29+=+.16+\"$
\n" ); document.write( " $\"+%28+.2+%2B+.2+%29+%2F+2.5+=+.16+\"$
\n" ); document.write( " $\"+.4+=+.16+%2A+2.5+\"$
\n" ); document.write( " $\"+.4+=+.4+\"$
\n" ); document.write( "OK \n" ); document.write( "

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