解方程组:1、6(x-y)-2(x-y)=14 2、3(x-y)+(x+y)+5 怎么解
解方程组:1、6(x-y)-2(x-y)=14 2、3(x-y)+(x+y)+5 怎么解
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
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 (1){2x-y=5,x-2y=1 (2){7x+3y=5,-5x+6y=-9
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
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
解一元二次方程组.(x+y)/2+(x-y)/3=6 4(x+y)-5(x-y)=2
(5)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和4(X+Y)-5(X-Y)=2
解方程组,1、x/2=y/3 3x-5y=9 2、 x-2y=-7 3(x-2)=1-y