Question
The average score received by Gwen, Elyse, Xylium and Emily in a recent History test was 85 marks. Gwen and Elyse both got 10p marks each while Xylium got half of Emily's marks. How many marks did Xylium score for the test? Express your answer in terms of p.
3 m

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The average score received by Gwen, Elyse, Xylium and Emily in a recent History test was 85 marks. Gwen and Elyse both got 10p marks each while Xylium got half of Emily's marks. How many marks did Xylium score for the test? Express your answer in terms of p.