Question
The average score received by Elyse, Natalie, Gillian and Irene in a recent History test was 71 marks. Elyse and Natalie both got 8z marks each while Gillian got half of Irene's marks. How many marks did Gillian score for the test? Express your answer in terms of z.
3 m

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The average score received by Elyse, Natalie, Gillian and Irene in a recent History test was 71 marks. Elyse and Natalie both got 8z marks each while Gillian got half of Irene's marks. How many marks did Gillian score for the test? Express your answer in terms of z.