SOLUTION: The sum of the ages of Petra and her mother is 48. Her mother is 9 years more than twice as old as Petra. How old are Petra and her mother?
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Question 1124068: The sum of the ages of Petra and her mother is 48. Her mother is 9 years more than twice as old as Petra. How old are Petra and her mother? Answer by ikleyn(52776) (Show Source):
Petra + Mother = 48
Petra + (2*Petra + 9) = 48
P + (2P +9) = 48
3P = 48 - 9
3P = 39 ====> P = 39/3 = 13.
Answer. Petra is 13 years old; the mother is 2*13+9 = 35 years old.
