Question
The average score received by Olivium, Opal, Emma and Dana in a recent Mathematics test was 70 marks. Olivium and Opal both got 10x marks each while Emma got half of Dana's marks. How many marks did Emma score for the test? Express your answer in terms of x.
3 m

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The average score received by Olivium, Opal, Emma and Dana in a recent Mathematics test was 70 marks. Olivium and Opal both got 10x marks each while Emma got half of Dana's marks. How many marks did Emma score for the test? Express your answer in terms of x.