document.write( "Question 607254: A college bookstore ordered six boxes of red pens. The store sold 39 red pens last eek and 42 red pens this week. 9 pens were left on the shelf. How many pens were in each box? \n" ); document.write( "
Algebra.Com's Answer #382539 by stanbon(75887)\"\" \"About 
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A college bookstore ordered six boxes of red pens. The store sold 39 red pens last eek and 42 red pens this week. 9 pens were left on the shelf. How many pens were in each box?
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\n" ); document.write( "Let # in each box be \"x\":
\n" ); document.write( "Equation:
\n" ); document.write( "6x - 39-42 = 9
\n" ); document.write( "6x -81 = 9
\n" ); document.write( "6x = 90
\n" ); document.write( "x = 15 (# of pens in each box)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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