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Post-UTME Mathematics 2018 Objective — Question 6

Question 6 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.

If x*y = x + y - 3xy, what is the value of x if x*2 = 13?

A. 3
B. 11/5
C. -11/5Correct
D. -3

Explanation

x+2-3x(2)=13. x+2-6x=13. -5x=11. x=-11/5.

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