Question

已知集合M ＝{(x，y)|x+y=2},N={(x，y)|x－y=4}，那么集合M∩N=____

已知集合M ＝{(x，y)|x+y=2},N={(x，y)|x－y=4}，那么集合M∩N=_____

Answer 1

x+y=2
x-y=4
解X=3 Y=-1
M∩N={(3,-1)}