Correct Answer: Option D

Explanation

2x + 3y = 10 .......1

3x - 2y = -11 ........2

4x + 6y = 20 

9x - 6y = -33

\(\overline{\frac{13x}{13} = \frac{-13}{13}}\), x = 1

from 

2x + 3y = 10

2(-1) + 3y = 10

-2 + 3y = 10

3y = 10 + 2

\(\frac{3y}{3} = \frac{12}{3}\), y = 4

x - y = -1 - 4

= - 5

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