丨X-2丨与(y+1)2互为相反数,则2X+Y的值

2025-05-08 07:56:29
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回答(1):

丨X-2丨与(y+1)2互为相反数
X-2=0
Y+1=0
X=2
Y=-1
2X+Y
=4-1
=3