In a competitive examination, 1 mark is awarded for each correct answer while 1/2 mark is deducted for every wrong answer. Jayanti answered 120 questions and got 90 marks. How many questions did she answer correctly?

Explanation

To solve the problem step by step, we will set up equations based on the information given and then solve for the number of questions Jayanti answered correctly.

### Step 1: Define Variables
Let:
- \( x \) = number of questions answered correctly
- \( y \) = number of questions answered incorrectly

### Step 2: Set Up the Equations
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