document.write( "Question 948427: a man is 3 times as old as his son. In 12 years time he will be twice as old as his son. How old is both of them? \n" ); document.write( "
Algebra.Com's Answer #578902 by macston(5194)\"\" \"About 
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F=Father's age=3S; S=Son's age
\n" ); document.write( "F=3S
\n" ); document.write( "F+12=2(S+12) Substitute for F
\n" ); document.write( "3S+12=2(S+12)
\n" ); document.write( "3S+12=2S+24 Subtract 2S from each side.
\n" ); document.write( "S+12=24 Subtract 12 from each side.
\n" ); document.write( "S=12 ANSWER 1:The son is 12 years old.
\n" ); document.write( "F=3S=3(12)=36 years old ANSWER 2: The father is 36 years old.
\n" ); document.write( "CHECK:
\n" ); document.write( "In 12 years:
\n" ); document.write( "F+12 years=2(S+12 years)
\n" ); document.write( "36+12=2(12+12)
\n" ); document.write( "48 years =48 years
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