SOLUTION: Katie's father is three times her age. How old are Katie and her father now if, in 4 years time, the sum of their ages is 68? Use K to represent Katie's age.

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Question 782185: Katie's father is three times her age. How old are Katie and her father now if, in 4 years time, the sum of their ages is 68? Use K to represent Katie's age.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +K+ = Katie's age now
+3K+ = father's age now
In 4 years, +K+%2B+4+ = Katie's age
In 4 years, +3K+%2B+4+ = father's age
-----------------------------------------
given:
+%28+K+%2B+4+%29+%2B+%28+3K+%2B+4+%29+=+68+
+4K+%2B+8+=+68+
+4K+=+60+
+K+=+15+
+3K+=+45+
Katie is 15 and her father is 45
check:
+%28+K+%2B+4+%29+%2B+%28+3K+%2B+4+%29+=+68+
+%28+15+%2B+4+%29+%2B+%28+45+%2B+4+%29+=+68+
+19+%2B+49+=+68+
+68+=+68+
OK