解方程组{x+2y=50,3x=2y+5}
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解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组3x+5(x+y)=2 3y-2(x+y)=4
解方程组 y=2x x+y=3
解方程组3分之x-y=2分之 x+y解方程组3分之x-y=2分之 x+y;2x-5y=7
解分式方程组x+y/3-3/x-y=2 x+y/5+2/x-y=5
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y)
解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1
解方程组 (x+y)^2-3(x+y)=54 (x-y)^2-5(x-y)=14
解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1}
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
解方程组:3(x+y)+2(x-y)=11,6(x+y)-5(x-y)=13.