# A father is 3 times older than his son and the sum of their ages is 40 years. Find their present age?

Friday, July 16th, 2010

### Solution:

**If we let the age of the father be “F”, and the age of the son be “S”, then we know the following:**

**1. F = 3 x S
2. F+S=40**

**Therefore, F=3x(40-F)…so 4F=120. **

**Therefore, F=30 and S=10.**

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