document.write( "Question 908429: Jack's father is 29 years old when jack was born. This year, the sum of their ages is 53. Find their ages. \n" ); document.write( "

Algebra.Com's Answer #551027 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+j+\"$ = Jack's age now
\n" ); document.write( "Let $\"+f+\"$ = father's age now
\n" ); document.write( "---------------------------
\n" ); document.write( "Note that the difference in their ages
\n" ); document.write( "will always be $\"+29+\"$ years
\n" ); document.write( "so, I can say:
\n" ); document.write( " $\"+f+%2B+j+=+53+\"$
\n" ); document.write( " $\"+f+-+j+=+29+\"$
\n" ); document.write( "--------------
\n" ); document.write( "Add the equations:
\n" ); document.write( " $\"+2f+=+82+\"$
\n" ); document.write( " $\"+f+=+41+\"$
\n" ); document.write( "and, since
\n" ); document.write( " $\"+f+%2B+j+=+53+\"$
\n" ); document.write( " $\"+41+%2B+j+=+53+\"$
\n" ); document.write( " $\"+j+=+12+\"$
\n" ); document.write( "The father is 41
\n" ); document.write( "Jack is 12
\n" ); document.write( " \n" ); document.write( "

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