Question 676544
Three times parents age of a father is equal to eight time age of his son. Eight years hence the father will twice as old as his son at that time. what are the paresant ages???
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Equation: 
3f = 8s
f+8 = 2(s+8)
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Solve for "s" and substitute to solve for "f":
s = (3/8)f
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Sustituting you get:
f + 8 = 2((3/8)f+8)
f + 8 = (1/2)f + 16
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(1/2)f = 8
f = 16 yrs
Note: That age for the father doesn't make much sense.
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Cheers,
Stan H.