Question
The average score received by Sabrina, Abi, Julie and Zara in a recent History test was 79 marks. Sabrina and Abi both got 10w marks each while Julie got half of Zara's marks. How many marks did Julie score for the test? Express your answer in terms of w.
3 m

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The average score received by Sabrina, Abi, Julie and Zara in a recent History test was 79 marks. Sabrina and Abi both got 10w marks each while Julie got half of Zara's marks. How many marks did Julie score for the test? Express your answer in terms of w.