SOLUTION: Katherine has given a riddle about her age. three times one year less than her age is at least 20.

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Question 1132205: Katherine has given a riddle about her age. three times one year less than her age is at least 20.
Found 2 solutions by addingup, MathTherapy:
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
3(x - 1) = > 20
3x - 3 => 20
3x = 23
x = 7.6667 = 7 year and 8 months

Answer by MathTherapy(10551) About Me  (Show Source):
You can put this solution on YOUR website!

Katherine has given a riddle about her age. three times one year less than her age is at least 20. 
AND?