→ windstormray:5 -7 114.47.101.136 01/21 20:35
→ colon:2 2 1.174.156.114 01/21 20:35
→ htx9:==colon 114.33.126.236 01/21 20:35
→ stephen0421:2 2 36.224.43.125 01/21 20:35
→ colon:收到 感恩 1.174.156.114 01/21 20:36
{ x +(-2y) = -2
{ 3x - (-y) = 8
求x、y解? 如x=1、y=1，推"1 1"就好
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