解方程组{x/2-y/5=4、x/3-y/15=3
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
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
解方程组{x/2-y/5=4、x/3-y/15=3
解方程组(x/2-y/5=4①,x/7-y/15=3②)
5x+2y=25 3x+4y=15 解方程组
解方程组;x/2-y/5=4;x/7-y/15=3
3x-2y=15 5x-4y=23 解这个方程组