→ colon:8 4 1.174.156.114 01/21 20:48
→ a016258:8 4 218.161.70.138 01/21 20:48
推 david308:8 4 111.243.95.137 01/21 20:48
→ htx9:==colon 114.33.126.236 01/21 20:48
→ colon:收到 感恩 1.174.156.114 01/21 20:48
{ 3x + y = 28
{ 2x - 3y = 4
求x、y解? 如x=1、y=1，推"1 1"就好
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