document.write( "Question 1173582: Monica is 4 years older her brother Kevin. Kevin is 9 years younger than Robert, the oldest child in the family. The sum of their ages is 37. How old are Robert, Monica, and Kevin \n" ); document.write( "

Algebra.Com's Answer #798828 by ikleyn(52794) $\"\"$ $\"About$

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document.write( "    Robert + Kevin + Monica    = 37\r\n" );
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document.write( "      x    + (x-9) + ((x-9)+4) = 37\r\n" );
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document.write( "      x    +  x-9  +   x-5     = 37\r\n" );
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document.write( "          3x   -  14           = 37\r\n" );
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document.write( "          3x                   = 37 + 14 = 51\r\n" );
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document.write( "           x                             = 51/3 = 17.\r\n" );
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document.write( "ANSWER.  Robert is 17 years old;  Kevin is  17-9 = 8 years old;  Monica is 8+4 = 12 years old.\r\n" );
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