解方程组.4\3x-2y+3\2x-5y=10.5\3x-2y﹣2\2x-5y=1.巧算.
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:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
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
方程组x-2y=8,3x-4y=5,x=?,y=?
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
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-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
关于X,Y的方程组3X+2Y=2m+5与x-y=4m-5的解x,y满足x+2y