document.write( "Question 1121555: Hi I’ve came up with an equation for the story problem but I am not very confident and would like some help. Below is the story problem \r
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\n" ); document.write( "\n" ); document.write( "Sherry is 31 years younger than her mom. The sum of their ages is 61. How old is Sherry? \n" ); document.write( "

Algebra.Com's Answer #737481 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "(1)  M = S + 31    (\"Sherry is 31 years younger than her mom.\")\r\n" );
document.write( "(2)  S + M = 61.   (\"The sum of their ages is 61\")\r\n" );
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document.write( "From (1), substitute M = S + 31  into equation (2). You will get\r\n" );
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document.write( "S + (S+31) = 61\r\n" );
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document.write( "2S + 31 = 61\r\n" );
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document.write( "2S = 61 - 31 = 30\r\n" );
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document.write( "S = 30/2 = 15.\r\n" );
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document.write( "Answer.  Sherry is 15 years old.\r\n" );
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