document.write( "Question 918730: Phil is 13 years old and his father is 4 times older. In how many years will the father be twice as old as his son? \n" ); document.write( "
Algebra.Com's Answer #557224 by ewatrrr(24785)\"\" \"About 
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Phil 13 , his father 52 now.
\n" ); document.write( "x the number of years hence
\n" ); document.write( "52 + x = 2(13+x)
\n" ); document.write( "26yr = x,years hence
\n" ); document.write( "And ... checking
\n" ); document.write( "78 = 2(39)
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