:解方程组 {(x+y)/2 +(x-y)/3 =6{ 3(x+y)-2(x-y)=12
解方程组(三分之x+y)+y=6,3(x+y)-y=24
解方程组(1)2x+3y=12 ,2x+y=0 (2)x+y=7,3(x+y)-7y=7
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
:解方程组 {(x+y)/2 +(x-y)/3 =6{ 3(x+y)-2(x-y)=12
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解方程组 1(2x-3y=-1 y=2x-1 ) 2(2x+5y=12 2x+3y=6 )3(3x-2y=6 2x+3y
解方程组:4(x+1)=3(y+3) x-2y=7y-6x/3
已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
不解方程组x+4y=6 x-3y=1求代数式7y(x-3y)的平方-2(3y-x)的立方
利用函数解方程组(1)4x+y=12 2x+y=8 (2)3x+y=12 4x+y=12
解方程组:1、6(x-y)-2(x-y)=14 2、3(x-y)+(x+y)+5 怎么解
解一元二次方程组.(x+y)/2+(x-y)/3=6 4(x+y)-5(x-y)=2