SOLUTION: A father is five years more than four times his son`s age, in five years he will be three times his son`s age then. Find their ages?

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Question 242629: A father is five years more than four times his son`s age, in five years he will be three times his son`s age then. Find their ages?
Answer by College Student(505) About Me  (Show Source):
You can put this solution on YOUR website!
Let son = x
Let dad = 5+4x
.
In five years dad will be three times his son's age then. So, our equation becomes:
%285%2B4x%29%2B5=3%28x%2B5%29
Now let's solve for x to determine the son's age.
4x%2B10=3x%2B15
4x-3x=15-10
x=5 <--- the son's age is 5 years old.
.
5%2B4x=5%2B%284%2A5%29=5%2B20=25 <--- dad is 25 years old.
.
Check:
%285%2B4x%29%2B5=3%28x%2B5%29
%285%2B%284%2A5%29%29%2B5=3%285%2B5%29
5%2B20%2B5=3%2A10
30=30
.
Done! ... Happy Thanksgiving Day !!