Please no 5 pake cara

jawabannya x-y sama dengan -2. pilihan jawaban A

3x + y = -2 (*3)
-2x + 3y = 5 (*1)

9x + 3y = -6
-2x + 3y = 5
________ _
11x = -11
x = -1

3x + y = -2
(3*(-1)) + y = -2
y = -2 + 3
y = 1

x - y = (-1) - 1 = -2 (a)