document.write( "Question 1137578: The average mass of 50 pumpkins is 2,1kg. If one more pumkin is added, the average mass is 2,2kg. What is the mass of the extra pumpkin? \n" ); document.write( "
Algebra.Com's Answer #755455 by josmiceli(19441)\"\" \"About 
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Let \"+a+\" = the mass of the added pumpkin
\n" ); document.write( "Let \"+b+\" = the total mass of the pumpkins
\n" ); document.write( "without the added pumpkin
\n" ); document.write( "\"+b%2F50+=+2.1+\"
\n" ); document.write( "\"+%28+b+%2B+a+%29+%2F+51+=+2.2+\"
\n" ); document.write( "-------------------------------
\n" ); document.write( "\"+b+=+2.1%2A50+\"
\n" ); document.write( "\"+b+=+105+\"
\n" ); document.write( "and
\n" ); document.write( "\"+%28+105+%2B+a+%29+%2F+51+=+2.2+\"
\n" ); document.write( "\"+105+%2B+a+=+112.2+\"
\n" ); document.write( "\"+a+=+7.2+\"
\n" ); document.write( "The extra pumpkin weighs 7.2 kg
\n" ); document.write( "--------------------------------------
\n" ); document.write( "check:
\n" ); document.write( "\"+%28+105+%2B+7.2+%29+%2F+51+=+2.2+\"
\n" ); document.write( "\"+112.2+=+2.2%2A51+\"
\n" ); document.write( "\"+112.2+=+112.2+\"
\n" ); document.write( "OK
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