document.write( "Question 847869: a father is 42 years old,his son is 10 years old and his daughter is 16 years old.\r
\n" ); document.write( "\n" ); document.write( "a) In how many years will the age of the father be the triple of that of his son?
\n" ); document.write( "b) In how many years will the age of the father be the sum of those of his children?
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Algebra.Com's Answer #510719 by hamsanash1981@gmail.com(151)\"\" \"About 
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a) let be the no of years taken to triple the age of his son.
\n" ); document.write( "then father's age = 42+x , son's age = 10+x.
\n" ); document.write( "42+x = 3(10+x)
\n" ); document.write( "42 + x = 30 + 3x
\n" ); document.write( "12 = 2x
\n" ); document.write( "x = 6 \r
\n" ); document.write( "\n" ); document.write( "b) Let x be the number of years. father's age = 42+x , son's age = 10+x, daughter's age = 16+x
\n" ); document.write( "42+x = 10+x + 16+ x
\n" ); document.write( "x=16
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