document.write( "Question 555758: callie is 4 years older than andrew. in 3 years the sum of their ages will be 52. how old is each now? i have have to solve each problem by creating a chart, writing an algebraic equation and then solving it \n" ); document.write( "

Algebra.Com's Answer #361935 by josmiceli(19441) $\"\"$ $\"About$

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A key to age problems is the fact that the difference in
\n" ); document.write( "two peoples ages remains the same throughout their lives.
\n" ); document.write( "This is obvious, but often overlooked
\n" ); document.write( "Let $\"+x+\"$ = Andrew's age now
\n" ); document.write( " $\"+x+%2B+4+\"$ = Callie's age now
\n" ); document.write( " $\"+x+%2B+3+\"$ = Andrew's age in 3 yrs
\n" ); document.write( " $\"+x+%2B+7+\"$ = Callie's age in 3 yrs
\n" ); document.write( "You can have columns headed $\"x\"$ , $\"+x+%2B+4+\"$ , $\"+x+%2B+3+\"$ , $\"+x+%2B+7+\"$
\n" ); document.write( "and the last column is $\"+x+%2B+3+%2B+x+%2B+7+=+2x+%2B+10+\"$
\n" ); document.write( "Under the last column you have $\"+52+\"$ for the sum of their ages
\n" ); document.write( "Now find $\"x\"$ with
\n" ); document.write( " $\"+2x+%2B+10+=+52+\"$
\n" ); document.write( " $\"+2x+=+42+\"$
\n" ); document.write( " $\"+x+=+21+\"$
\n" ); document.write( "Now work your way back to the 1st 2 columns \n" ); document.write( "

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