方程组 {2x-3y=-5 {3x+2y=12
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
方程组x-2y=8,3x-4y=5,x=?,y=?
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:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
用换元法解方程组 2分之x+y+3分之x-y=6 2(x+y)+(x-y)=12
换元法解方程组3/x+y+2/x-y=17/5 2/x+y-5/x-y=1
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
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 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快