Pls ans urgently dear experts: An instructor scored a student,s test of 50 questions by subtracting two times the no.of wrong answers from the no.of right answers.If score is 26,find out the no.of right answers?

Dear Student,

Please find the solution.

Assume that x be a number of correct answer.
So 50-x is the number of wrong answer.
Hence according to the question 
x-2(50-x)=26
=> x-100+2x=26
=> 3x=126
=> x=126/3
=> x=42
Hence the number of correct answer is 42.

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