8x-5( 10-x)=4 1

X=7 for solving the equation,

That's seven questions, and three questions are wrong.

Method 2: Assuming all the answers are correct, * * * gets 80 points.

In fact, the score is only 4 1, 80-4 1=39.

If you don't get 8 points for a mistake, you have to deduct 5 points.

Equivalent to the wrong deduction 13 points.

So the wrong answer: 39÷ 13=3.

Correct answer: 10-3=7.