Incorrectly 7492

The test has 50 questions. Four points are counted for each correct answer, 3 points are deducted for an incorrect answer, and 2 points are deducted for an unanswered question. Peter scored 108 points on the test but answered only 6 questions. How many questions did Peter answer incorrectly?

Correct answer:

n =  8

Step-by-step explanation:

108 = 4·(50-6-n) - 3·n -2·6

7n = 56

n = 56/7 = 8

n = 8

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