方程组:4X-3Y=5 2X-Y=2 3X-5Y=-9 2X+7Y=-6
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0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
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
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:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
方程组x-2y=8,3x-4y=5,x=?,y=?
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)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
X+2y=o 3X+4y=6 方程组 要过程还有5X+6y=16 7X-9Y=5