解方程组:2x-3y=9(1),7x+4y=17(2)
解方程组:2x-3y=9(1),7x+4y=17(2)
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
解二元一次方程组{3(x+y)-4(x-y)=4,x+y/2+x-y/6=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1
解方程组:4(x+1)=3(y+3) x-2y=7y-6x/3
2+3x/5+4y=9,4+6y-y=1解方程组
解方程组x/4+Y/4=2,x/6+y/3=2; X+2Y=1,2X-3Y=2; 4X-3Y=17,5X+Y=7