2x-y=10 5x+6y=42解方程组
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组X+Y/2=3X-2Y=10+6X+Y/4
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
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:{二分之x+y+二分之x-y=6,4(x+y)-5(x-y)=2()
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
5x-6y=1,2x-6y=10这个方程组怎么解?
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组