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In an examination, +5 marks are scored by a student if a question is answered correctly and −2 marks are scored by a student if a question is answered incorrectly. If Markus attempts x questions correctly and y questions incorrectly, find the total marks scored by Markus in the examination.

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In an examination, +5 marks are scored by a student if a question is answered correctly and 2 marks are scored by a student if a question is answered incorrectly. If Markus attempts x questions correctly and y questions incorrectly, find the total marks scored by Markus in the examination.



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