document.write( "Question 936752: Jack is 13 years older than Mary. Together their ages total 153. How old is Jack and how old is Mary?
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Algebra.Com's Answer #570247 by Danielshinmath(31) $\"\"$ $\"About$

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Since Jack is 13 years older than Mary, write it like this.
\n" ); document.write( "J=M+13, where J is Jack and M is Mary.
\n" ); document.write( "If J+M=153, the substitute J for M+13.
\n" ); document.write( "It ends up looking like this- 2M+13=153.---> 2M=140--->M=70
\n" ); document.write( "So Mary is 70, and Jack is 70+13=83 years old.
\n" ); document.write( "ANSWER: MARY=70,JACK=83 \n" ); document.write( "

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