Question 753838
father's age is three times the sum of the ages of his two children. after 5years his age will be twice the sum of the ages of two children. find the age of father 
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Equations:
f = (a + b)
f+5 = 2(a+5+b+5)
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Modify:
f = a + b
f = 2(a+b)+20
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Substitute to get:
(a+b) = 2(a+b)+20
a+b  = -20
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father = a+b = -20
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That doesn't make any sense
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Cheers,
Stan H.