Question
The average score received by Jen, Anna, Shannon and Wendy in a recent Mathematics test was 89 marks. Jen and Anna both got 10t marks each while Shannon got half of Wendy's marks. How many marks did Shannon score for the test? Express your answer in terms of t.
3 m

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The average score received by Jen, Anna, Shannon and Wendy in a recent Mathematics test was 89 marks. Jen and Anna both got 10t marks each while Shannon got half of Wendy's marks. How many marks did Shannon score for the test? Express your answer in terms of t.