SOLUTION: out of 35 programmers,25 knows FORTRAN, 28 knows pascal and 2 know neither. How many know both the languages?

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Question 173939: out of 35 programmers,25 knows FORTRAN, 28 knows pascal and 2 know neither. How many know both the languages?
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
35=(25+28-x)+2
35=53-x+2
x=53+2-35
x=55-25
x=20 number of programmers who know both languages.