document.write( "Question 1135664: Kyle is 28 years older than Sophia. in 9 years the sum of their ages will be 90. How old are they now? \n" ); document.write( "

Algebra.Com's Answer #753298 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "K - S = 28.      (1)\r\n" );
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document.write( "The sum of their ages now is  90 - 2*9 = 72.  It gives you SECOND equation\r\n" );
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document.write( "K + S = 72.      (2)\r\n" );
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document.write( "Add equations (1) and (2). You will get\r\n" );
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document.write( "2K = 28 + 72 = 100  ===============>  K = 100/2 = 50.\r\n" );
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document.write( "Hence, S = 72 - 50 = 22.\r\n" );
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document.write( "ANSWER.  K is 50 years old;  S is 22 years old.\r\n" );
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