A boy gets 3 marks for each correct answer and loses 1 marks for each incorrect answer. He 45 questions and obtains 103 marks. Find the number of questions correctly solved by him.
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Answer:
17
Step-by-step explanation:
3x - (24 - x) * 2 = 37
3x - 48 + 2x = 37
5x - 48 = 37
5x = 37 + 48
5x = 85
x = 85/5
Therefore the ones he got correctly are 17
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