Question
The average score received by Zara, Nicole, Anna and Xylium in a recent Chinese test was 79 marks. Zara and Nicole both got 10r marks each while Anna got half of Xylium's marks. How many marks did Anna score for the test? Express your answer in terms of r.
3 m

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The average score received by Zara, Nicole, Anna and Xylium in a recent Chinese test was 79 marks. Zara and Nicole both got 10r marks each while Anna got half of Xylium's marks. How many marks did Anna score for the test? Express your answer in terms of r.