x-y=4
4x+2y=-1
x=y+4
4y+16+2y=-1
6y=-17
y=-17/6
x=7/6
x減y等于4 和4x加2y等于負1
x減y等于4 和4x加2y等于負1
數(shù)學(xué)人氣:388 ℃時間:2019-12-08 01:23:57
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