SOLUTION: a father is 30 years older than his son. three years ago he was four times as old as his son. how old is the father?
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Question 600434: a father is 30 years older than his son. three years ago he was four times as old as his son. how old is the father?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
f=s+30
f-3=4*(s-3)
f-3=4s-12
s+30-3=4s-12
x+27=4s-12
39=3x
13=s
43=f
check
40=4*10
ok
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