document.write( "Question 371633: Jack is 5 years older than his sister Mary. The sum of their ages is 37. How old is Jack. Show your work. \n" ); document.write( "
Algebra.Com's Answer #264701 by stanbon(75887)\"\" \"About 
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Jack is 5 years older than his sister Mary. The sum of their ages is 37. How old is Jack. Show your work.
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\n" ); document.write( "Equations:
\n" ); document.write( "j = m+5
\n" ); document.write( "j+m = 37
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\n" ); document.write( "Substitute for \"j\" and solve for \"m\":
\n" ); document.write( "m+5 + m = 37
\n" ); document.write( "2m = 32
\n" ); document.write( "m = 16 (Mary's age now)
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\n" ); document.write( "Since j = m+5, j = 21 (Jack's age now)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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