document.write( "Question 781329: Please help me with an equation for this problem
\n" ); document.write( "A moving company weighs 20 boxes packed that contains books or clothes and says the total weight is 404 pounds. You know that a box of books weighs 40 pounds and a box of clothes weighs 7 pounds. Write and solve an equation to find how many boxes of books and how many boxes of clothes. \n" ); document.write( "
Algebra.Com's Answer #475869 by ramkikk66(644)\"\" \"About 
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document.write( "Let the number of boxes with clothes be x\r\n" );
document.write( "Then the number of boxes with books is 20 - x\r\n" );
document.write( "Each cloth box weighs 40 lb and book box weighs 7 lb\r\n" );
document.write( "Total weight of cloth boxes = 40*x\r\n" );
document.write( "Total weight of book boxes = (20 - x)*7 = 140 - 7*x\r\n" );
document.write( "Given that the total weight is 404 lb. We have the equation\r\n" );
document.write( "\"40%2Ax+%2B+140+-+7%2Ax+=+404\"\r\n" );
document.write( "\"33%2Ax+=+404+-+140+=+264\"\r\n" );
document.write( "\"x+=+264%2F33+=+8\"\r\n" );
document.write( "So the number of boxes with clothes = \"highlight%288%29\"\r\n" );
document.write( "Number of boxes with books = 40 - 8 = \"highlight%2832%29\"\r\n" );
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