Posted by **Mary** on Saturday, November 3, 2012 at 10:45pm.

There are 40 questions on a class test. Six points are given for each correct answer and three points are deducted for each wrong answer. Find the number of correct answers for a test score of 105.

- Math -
**Reiny**, Saturday, November 3, 2012 at 10:50pm
correct --- x

incorrect --- 40-x

6x - 3(40-x) = 105

6x - 120 + 3x = 105

9x = 225

x = 25

25 correct , 15 wrong

- Math -
**mike**, Tuesday, March 31, 2015 at 10:03pm
5-2(12-5)=39

5-24+2=39

7=63

9

I Need to know am I right

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