Associative Property of Addition
Yes; to figure this out just plug the x,y values into the equation and make sure they come out true
Well n could equal 9 and they would both be the same thing but if n equaled 6 then it would be less but if it equaled 11 then it would be over 12
Answer: x= -1, y= -3
Step-by-step explanation
solve like a system of equations
x-y-2 = 0
+
x+y+4=0
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2x+2=0, 2x= -2, x= -1, then plug that back into either equation
-1+y+4=0, y+3=0, y= -3
