Question

Aidan is doing a multiple choice test with 20 questions. He scores 3 marks for a correct answer and loses 1 mark if the answer is incorrect. Aidan answers all the questions and scores 40 marks. How many questions has he answered correctly? pls ans the question with steps​

Answer 1

Answer:

answer of this I don't know

Answer 2

Answer:

15

Step-by-step explanation:

Let x = number of questions Michael got right

therefore, 20 - x = number of incorrect answers

3x - (20 - x) = 40

4x - 20 = 40

x = 40+20/4

ANSWER: 15