document.write( "Question 492894: last year backpack sales were 10% more than they were the year before. this yer's sales are 1452 units, which is 10% more than last year. find the number of backpacks sold two years ago. \n" ); document.write( "

Algebra.Com's Answer #335209 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = backpack sales 2 yrs ago
\n" ); document.write( "given:
\n" ); document.write( "Last year's sales were $\"+x+%2B+.1x+=+1.1x+\"$
\n" ); document.write( "This year's sales = $\"+1.1x+%2B+.1%2A%281.1x%29+=+1.1x%2A%281+%2B+.1%29+\"$
\n" ); document.write( " $\"+1.1x%2A%281+%2B+.1x%29+=+1.1%5E2%2Ax+\"$
\n" ); document.write( " $\"+1.1%5E2%2Ax+=+1.21x+\"$
\n" ); document.write( "Also given:
\n" ); document.write( " $\"+1.21x+=+1452+\"$
\n" ); document.write( " $\"+x+=+1200+\"$
\n" ); document.write( "1200 backpacks were sold 2 years ago \n" ); document.write( "

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