document.write( "Question 426151: how many pounds of chocolate worth $1.20 a pound must be mixed with 10 pounds of chocolate worth 90 cents a pound to produce a mixture worth $1.00 a pound? \n" ); document.write( "

Algebra.Com's Answer #296520 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"x\"$ = pounds of $1.20/lb chocolate needed
\n" ); document.write( "(cost of chocolate) / (pounds of chocolate) = cost per pound
\n" ); document.write( " $\"+%281.2x+%2B+10%2A.9%29+%2F+%28x+%2B+10%29+=+1+\"$
\n" ); document.write( " $\"+1.2x+%2B+9+=+x+%2B+10+\"$
\n" ); document.write( " $\"+.2x+=+1+\"$
\n" ); document.write( " $\"+x+=+5+\"$
\n" ); document.write( "5 pounds are needed
\n" ); document.write( "check:
\n" ); document.write( " $\"+%281.2%2A5+%2B+10%2A.9%29+%2F+%285+%2B+10%29+=+1+\"$
\n" ); document.write( " $\"+%28+6+%2B+9+%29+%2F+15+=+1+\"$
\n" ); document.write( " $\"+15%2F15+=+1+\"$
\n" ); document.write( " $\"+15+=+15+\"$ \n" ); document.write( "

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