用消元法解方程组{3x+4y=18,2x-3y=-5
用消元法解方程组{3x+4y=18,2x-3y=-5
方程组x-2y=8,3x-4y=5,x=?,y=?
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: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
用消元法解方程组 4x+3y=5 x-2y=4
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{ 3x-4y(x-y)=3 { 2x-3y=1