解方程组:①4x+3y-5=0,x-2y-4=0.②5x-2=2(y-1),2(x-2)+(y-1)③0.2x+0.5y
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:①4x+3y-5=0,x-2y-4=0.②5x-2=2(y-1),2(x-2)+(y-1)③0.2x+0.5y
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
解下列方程组:①{3x+5y+42,x/2=y/3.②{x+y/5=x-y/3=2.③3(x-1)-4(y-4)=0,5
解方程组(1)2x-3y=10,-4x+y=5 (2)3x-2y=15,5x-4y=23
用代入法解下列方程组 ①{y=1-x 3x+2y=5 ②{2x-y=5 3x+4y=2 ③{x-y-3=0 3x-8y=
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:2(x-y)/3-x+y/4=-1 ,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