6x-3y=31 2x-5x=-20 解方程组用加减消元法
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6x-3y=31 2x-5x=-20 解方程组用加减消元法
6x-3y=31 2x-5x=-20 解方程组用加减消元法
6x-3y=31 2x-5x=-20 解方程组用加减消元法
6x-3y=31 2x-5y=-20
6x-15y=-60
12y=91
y=91/12
x=-10+5y/2=215/24
2x-5x=-20 对吗?写错了吧?
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
解联立方程组 x/x+y=5/8 x/x+y+6=2/3
3x*5y+2x*6y=2.7*(3x+2x)怎么解
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
解二元一次方程:x+y/2+x-y/3=6 4(x+y)-5(x-y)=2
解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y)
解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2
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)=12
解方程组:3(x+y)+2(x-y)=11,6(x+y)-5(x-y)=13.
解方程组:x+y/2+x-y/3=6,(x+y)+5(x-y)=38 谢.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)