Answer:
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Step-by-step explanation:
A. x= -3 , y= 3
x + y =
-3 + 3 = 0
B. x= -3 , y= -3
-3 + -3 = -6
C. x= 3 , y= 3
3 + 3 =6
D. x= 3 , y= -3
3 + -3 = 0
