document.write( "Question 143608: Mrs. Gardner went to the market. She purchased some lettuce heads and some tomatoes. There were 12 items purchased. She bought twice as many tomatoes as lettuce heads. \n" ); document.write( "
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let lettuce=l
\n" ); document.write( "let tomatoes=t\r
\n" ); document.write( "\n" ); document.write( "12=l+t
\n" ); document.write( "t=2l\r
\n" ); document.write( "\n" ); document.write( "Substitute t=2l into the first equation.\r
\n" ); document.write( "\n" ); document.write( "12=l+2l
\n" ); document.write( "12=3l
\n" ); document.write( "4=l\r
\n" ); document.write( "\n" ); document.write( "Thus she bought 4 lettuce heads and 8 tomatoes. This follows and is easily checked.
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