Problema Solution
Joshua took a math contest with 25 questions. Each correct answer earned 6 points while each incorrect answer deducted 4 points. Joshua answered every question and earned 100 points. How many questions did Joshua answer correctly?
Answer provided by our tutors
Let 'x' represent the number of questions answered correctly.
Then then the number of incorrect answered questions is: '25 - x'.
6x - (25 - x)*4 = 100
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x = 20 questions
Joshua answered 20 questions correctly.