document.write( "Question 173939: out of 35 programmers,25 knows FORTRAN, 28 knows pascal and 2 know neither. How many know both the languages? \n" ); document.write( "
Algebra.Com's Answer #128840 by checkley77(12844)\"\" \"About 
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35=(25+28-x)+2
\n" ); document.write( "35=53-x+2
\n" ); document.write( "x=53+2-35
\n" ); document.write( "x=55-25
\n" ); document.write( "x=20 number of programmers who know both languages.
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