document.write( "Question 1095074: Joanna reads 2/7 of a book on the 1st day and 3/5 of the remaining on second day. if she still has 140 pages left to read, how many total pages are there in the book? \n" ); document.write( "

Algebra.Com's Answer #709621 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = total number of pages in book
\n" ); document.write( "The 1st day:
\n" ); document.write( " $\"+%28+2%2F7%29%2Ax+\"$
\n" ); document.write( "( note there is $\"+5%2F7+\"$ of the book left to read )
\n" ); document.write( "The 2nd day:
\n" ); document.write( " $\"+%283%2F5%29%2A%285%2F7%29%2Ax+\"$
\n" ); document.write( " $\"+%28+3%2F7+%29%2Ax+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "I can say:
\n" ); document.write( " $\"+%282%2F7%29%2Ax+%2B+%28+3%2F7+%29%2Ax+%2B+140+=+x+\"$
\n" ); document.write( "Multiply both sides by $\"+7+\"$
\n" ); document.write( " $\"+2x+%2B+3x+%2B+980+=+7x+\"$
\n" ); document.write( " $\"+2x+=+980+\"$
\n" ); document.write( " $\"+x+=+490+\"$
\n" ); document.write( "There are 490 pages in book
\n" ); document.write( "----------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%282%2F7%29%2A490+%2B+%283%2F7%29%2A490+%2B+140+=+490+\"$
\n" ); document.write( " $\"+140+%2B+210+%2B+140+=+490+\"$
\n" ); document.write( " $\"+490+=+490+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );