2x+3y=1 5x-6y=7解方程组
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
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
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
2x+3y=1 5x-6y=7解方程组
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
解方程组 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9
解二元一次方程组(x+3)(y+5)=(x+1)(y+8),(2x-3)(5y+7)=2(5x-6)(y+1)
解二元一次方程组(x-y)/3+(x+y)/2=1/6 5(x+y)-2(x-y)=7
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 5(x+y)-2(x-y)=4
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2