document.write( "Question 1056533: sonu's grandmother is 80 years old and sonu is 20 year old . how many years ago was his grandmother 7 times as old as sonu ? \n" ); document.write( "
Algebra.Com's Answer #671635 by addingup(3677)\"\" \"About 
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Today grandma is 80 and Sonu is 20. This is smoke screen information, you don't need it.
\n" ); document.write( ":
\n" ); document.write( "Here is what we have to find:
\n" ); document.write( "find when
\n" ); document.write( "80-x = 7(20-x)
\n" ); document.write( "80-x = 140-7x add 7x and subtract 80 on both sides
\n" ); document.write( "6x = 60
\n" ); document.write( "x = 10 10 years ago is our answer
\n" ); document.write( "-------------------------
\n" ); document.write( "Check:
\n" ); document.write( "10 years ago, grandma was:
\n" ); document.write( "80-10 = 70
\n" ); document.write( "and Sonu was:
\n" ); document.write( "20-10 = 10
\n" ); document.write( "Grandma was 7 times older than Sonu, so Sonu times 7 = grandma:
\n" ); document.write( "10*7 = 70 Correct \n" ); document.write( "
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