Question 822786
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Hi,
There are 40 questions on a class test. 
6 points are given for each correct answer {{{highlight_green(x)}}} and 3 points are deducted for each incorrect answer. 
Find the number of correct answers for a test score of 105
Question states***
   6x - 3(40-x) = 105
       9x = 225
        x = 25, number of correct answers
CHECKING our answer***(15 incorrect)
   150 - 45 = 105