document.write( "Question 1167239: Sara and Melissa are best friends. Sara is 3 years older than Melissa. their combined age is 15. How old is Sara \n" ); document.write( "

Algebra.Com's Answer #791837 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "Sara = x\r\n" );
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document.write( "Melissa = x-3\r\n" );
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document.write( "    x + (x-3) = 15\r\n" );
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document.write( "    2x - 3    = 15\r\n" );
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document.write( "    2x        = 15 + 3 = 18\r\n" );
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document.write( "     x                 = 18/2 = 9.\r\n" );
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document.write( "ANSWER.  Sara is 9 years old.\r\n" );
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