document.write( "Question 808149: Jack is 27 years older than susan. in 5 years time he will be 4 times as old as her. find the present ages of jack and susan \n" ); document.write( "

Algebra.Com's Answer #486765 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+j+\"$ = Jack's age now
\n" ); document.write( "Let $\"+s+\"$ = Susan's age now
\n" ); document.write( " $\"+j+%2B+5+\"$ = Jack's age 5 yrs from now
\n" ); document.write( " $\"+s+%2B+5+\"$ = Susan's age 5 yrs from now
\n" ); document.write( "-----------------------------------
\n" ); document.write( "(1) $\"+j+=+s+%2B+27+\"$
\n" ); document.write( "(2) $\"+j+%2B+5+=+4%2A%28+s+%2B+5+%29+\"$
\n" ); document.write( "-----------------------
\n" ); document.write( "(2) $\"+j+%2B+5+=+4s+%2B+20+\"$
\n" ); document.write( "(2) $\"+j+-+4s+=+15+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+j+-+s+=+27+\"$
\n" ); document.write( "-------------------
\n" ); document.write( "Subtract (2) from (1)
\n" ); document.write( "(1) $\"+j+-+s+=+27+\"$
\n" ); document.write( "(2) $\"+-j+%2B+4s+=+-15+\"$
\n" ); document.write( " $\"+3s+=+12+\"$
\n" ); document.write( " $\"+s+=+4+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+j+=+s+%2B+27+\"$
\n" ); document.write( "(1) $\"+j+=+4+%2B+27+\"$
\n" ); document.write( "(1) $\"+j+=+31+\"$
\n" ); document.write( "Jack is 31 and Susan is 4
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+j+%2B+5+=+4%2A%28+s+%2B+5+%29+\"$
\n" ); document.write( "(2) $\"+31+%2B+5+=+4%2A%28+4+%2B+5+%29+\"$
\n" ); document.write( "(2) $\"+36+=+4%2A9+\"$
\n" ); document.write( "(2) $\"+36+=+36+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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