document.write( "Question 814645: what if the classes bought 120 containers and had 30 more cans than bags how many bags and how many cans and bags did they buy? \n" ); document.write( "
Algebra.Com's Answer #490421 by LinnW(1048)\"\" \"About 
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set c = number of cans
\n" ); document.write( " b = number of bags
\n" ); document.write( "c + b = 120
\n" ); document.write( "c = b + 30 we need to add 30 to number of bags to make these equal\r
\n" ); document.write( "\n" ); document.write( "If we substitute ( b+30 ) for c in
\n" ); document.write( "c + b = 120 we have
\n" ); document.write( "(b+30) + b = 120
\n" ); document.write( "2b + 30 = 120
\n" ); document.write( "Subtract 30 from each side
\n" ); document.write( " 2b = 120 - 30
\n" ); document.write( " 2b = 90
\n" ); document.write( " b = 45
\n" ); document.write( "Since c = b+20
\n" ); document.write( " c = 45+20
\n" ); document.write( " c = 65
\n" ); document.write( " \n" ); document.write( "
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