SOLUTION: tHE father said to his son 'if im in your age now your only 3 years old. If you are in my age now, im already 78 years old. how old is the son now?

Question 264795: tHE father said to his son 'if im in your age now your only 3 years old. If you are in my age now, im already 78 years old. how old is the son now?
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
dads age now=x
sons age now=y
x>y
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these are the 3 equations you must find from the problem
we are looking to find what "n" is so we can find out the ages
Same "n" years between "y" and 3 ("n" didnt start at 0, it started at 3, so you have to add 3 to "n" to get "y")
Same "n" years between 78 and "x"
"n" = the number of years between x and y
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Use substitution method
n=x-y

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plug the value of "n" into the"x" and "y" equations from above

Dads age now
.

Sons age now
.
checking answers:
n=x-y

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