document.write( "Question 697276: A father is twice as old as son now. If father is 5/3 times the age of son after 10 years, find their present ages.
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Algebra.Com's Answer #429848 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+f+\"$ = Father's age now
\n" ); document.write( "Let $\"+s+\"$ = Son's age now
\n" ); document.write( " $\"+f+%2B+10+\"$ = Father's age in 10 years
\n" ); document.write( " $\"+s+%2B+10+\"$ = Son's age in 10 years
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"+f+=+2s+\"$
\n" ); document.write( "(2) $\"+f+%2B+10+=+%285%2F3%29%2A%28+s+%2B+10+%29+\"$
\n" ); document.write( "----------------------------
\n" ); document.write( "(2) $\"+f+%2B+10+=+%285%2F3%29%2As+%2B+50%2F3+\"$
\n" ); document.write( "Substitute (1) into (2)
\n" ); document.write( "(2) $\"+2s+%2B+10+=+%285%2F3%29%2As+%2B+50%2F3+\"$
\n" ); document.write( "(2) $\"+6s+%2B+30+=+5s+%2B+50+\"$
\n" ); document.write( "(2) $\"+s+=+50+-+30+\"$
\n" ); document.write( "(2) $\"+s+=+20+\"$
\n" ); document.write( "and, since,
\n" ); document.write( "(1) $\"+f+=+2s+\"$
\n" ); document.write( "(1) $\"+f+=+2%2A20+\"$
\n" ); document.write( "(1) $\"+f+=+40+\"$
\n" ); document.write( "The Father is 40 and
\n" ); document.write( "The Son is 20
\n" ); document.write( "-------------
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+f+%2B+10+=+%285%2F3%29%2A%28+s+%2B+10+%29+\"$
\n" ); document.write( "(2) $\"+40+%2B+10+=+%285%2F3%29%2A%28+20+%2B+10+%29+\"$
\n" ); document.write( "(2) $\"+50+=+%285%2F3%29%2A30+\"$
\n" ); document.write( "(2) $\"+50+=+50+\"$
\n" ); document.write( "OK\r
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