document.write( "Question 1190207: A full box of ball bearings weighs 21 pounds. The box plus 1/3 of the ball bearings weighs 9 pounds. How much does the box alone weigh?
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\n" ); document.write( "D) 6 pounds
\n" ); document.write( "E) 2 pounds\r
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Algebra.Com's Answer #821802 by ikleyn(52787) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( " You can solve this problem, as the other tutor has shown in his post.\r
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\n" ); document.write( "\n" ); document.write( " Or, alternatively, you can solve it mentally, without using equations.\r
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document.write( "The difference between the first case items and the second case items is 2/3 of the box of ball bearings, which weights 21 - 9 = 12 pounds.\r\n" );
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document.write( "Hence, 1/3 of the box of ball bearing weights 6 pounds.\r\n" );
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document.write( "It means that the full box of ball bearings weights 6*3 = 18 pounds (with no box itself),\r\n" );
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document.write( "and the box itself weights 21-18 = 3 pounds.   ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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