document.write( "Question 1156997: The electrician was upset. She knew that \"b\" batteries would power \"d\" circuits for 11 days, but she had \"d\" +8 circuits to power. How many days would \"r\" batteries last? \r
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Algebra.Com's Answer #779851 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "From the given data, the rate of consumption is    batteries per one circuit per day,  in the first case.\r\n" );
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document.write( "In the other case, the rate of consumption is  .\r\n" );
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document.write( "Assuming the the rate of consumption is the same in both cases, we can write this equation\r\n" );
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document.write( "     = .\r\n" );
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document.write( "In this proportion, the variable \"r\" is unknown.\r\n" );
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document.write( "Cancel \"b\" in both sides and express  \"r\"  from the proportion  r = .    ANSWER\r\n" );
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document.write( "Now, when the formula is obtained, you can easily interpret it by many different ways . . . \r\n" );
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