SOLUTION: A man was 30 years old when his son was born. The father's age is 6 years greater than 3 times the son's age. How old is each at present? Please help me solve this question...thank

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Question 770112: A man was 30 years old when his son was born. The father's age is 6 years greater than 3 times the son's age. How old is each at present? Please help me solve this question...thank you!
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +f+ = the father's age now
The difference in their ages will
always be +30+ years, so
+f+-+30+ = the son's age now
---------------------------
+f+=+3%2A%28+f+-+30+%29+%2B+6+
+f+=+3f+-+90+%2B+6+
+2f+=+90+-+6+
+2f+=+84+
+f+=+42+
and
+s+=+42+-+30+
+s+=+12+
The father is 42 and the son is 12
-----------
check:
+f+=+3%2A%28+f+-+30+%29+%2B+6+
+42+=+3%2A%28+42+-+30+%29+%2B+6+
+42+=+3%2A12+%2B+6+
+42+=+42+
OK