document.write( "Question 1145535: My sister is 15 years older than I am. The sum of our age is 49. Find our age \n" ); document.write( "

Algebra.Com's Answer #766757 by ikleyn(52778) $\"\"$ $\"About$

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document.write( "Let x = \"my\" age.\r\n" );
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document.write( "Then the sister's age = x+15.\r\n" );
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document.write( "The sum of ages equation is\r\n" );
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document.write( "    x + (x+15) = 49.\r\n" );
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document.write( "    2x + 15 = 49\r\n" );
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document.write( "    2x      = 49 - 15 = 34.\r\n" );
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document.write( "     x                = 34/2 = 17.\r\n" );
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document.write( "ANSWER. My age is 17.  The sister's age is 17+15 = 32.\r\n" );
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document.write( "CHECK.  17 + 32 = 49.   ! Correct !\r\n" );
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