｛ y=3x+23x+y=8｛m+2n=35m+7n=18｛4x+3y=33x-y=15

选择题：设集合M={(x,y)|2x+3y=8},N={(x,y)|3x+2y=7},则M∩N= 若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m, 若全集I={(x,y)|x,y∈R},集合M={(x,y)|(y-3)/(x-2)},N{(x,y)|y=x=1},则( 3x+4y=-5 5x+6y=-9 (n-8m)x-8y=10 5x+(10m+2n)y=-9 求m.m+n.n=? 设全集U=｛（x,y)|x,y属于R｝,集合M={(x,y)|(y-3)除以(x-2)=1},N={(x,y)|y不等于 已知x^3m=8,y^3n=27,求（x^2m)^3+(y^n)^3-x^2m*y^n 2x^6n-x^4n×y^3m-y^9m,已知x^2n=3,y^3n=2,求值 (1)x-3y=2,y=x;(2)x+y=52x+y=8(3)4x+3y=5,x-2y=4;(4)m-n/2=22m+3 已知M={（x，y）|2x+3y=4320，x，y∈N}，N={（x，y）|4x-3y=1，x，y∈N}，则（　　） 已知集合M={（x，y）|y=x+3}，N={（x，y）|y=-2x+6}，则M∩N=______． 帮我解下方程组：3x-2y=10,2x-y=0和3m-4n=7,9m-10n+23最后还有个x+y=35,2x+4y=9 若x^3m=4,y^3n=5,求（x^2m)^3+(y^n)^3—x^2m·y^n·x^4m·y^2n的值