SOLUTION: David is 3 years older than his brother John. Three years ago John's age was 6 more than one-fourth of David's age. What are their present ages? I have been confused and frustrated

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Question 669962: David is 3 years older than his brother John. Three years ago John's age was 6 more than one-fourth of David's age. What are their present ages? I have been confused and frustrated for hours please help!
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
D = J+3
J-3 = 6 + 1%2F4D
...
J-3 = 6 + 1%2F4(J+3)
J-3 = 6 + 1%2F4J+%2B+3%2F4
...
J - 1%2F4J = 6 + 3%2F4 + 3
3%2F4J = 9 + 3%2F4
3%2F4J = 39%2F4
J = %2839%2F4%29%284%2F3%29
highlight_green%28J+=+13%29 years old
...
D = 13 + 3
highlight_green%28D+=+16%29 years old
...
Check
13 - 3 = 10
6 + 1%2F4(16) = 10
.....................
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