document.write( "Question 426628: A block of ice loses one third of its weight every hour. After 2 hours, the block weighs 40 pounds. How much did the block weigh to begin with?
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Algebra.Com's Answer #296765 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Let x represent how the block weighed to begin with
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document.write( "Question states***
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document.write( " x - x/3 - (1/3)(x/3) = 40lb    |loses one third of its weight every hour
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document.write( "Solving for x
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document.write( " x - x/3 - x/9 = 40
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document.write( " 9x - 3x - x = 360
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document.write( "       5x = 360
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document.write( "        x = 72lbs, original weight of the block\r
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document.write( "CHECKING our Answer***
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document.write( "   72lb - 24lb - 8lb = 40lbs \n" );
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