已知(2X-Y)與|X+2Y-5|互為相反數求(X-Y)2013的值

已知(2X-Y)與|X+2Y-5|互為相反數求(X-Y)2013的值


已知(2X-Y)²;與|X+2Y-5|互為相反數求(X-Y)2013的值
2X-Y=0
X+2Y-5=0
聯立方程,解得X=1,Y=2
(X-Y)^2013=(1-2)^2013= -1