解方程组 (x+y)(x+y-1)=56 (x-y)(x-y-1)=12
解方程组(1)2x+3y=12 ,2x+y=0 (2)x+y=7,3(x+y)-7y=7
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(三分之x+y)+y=6,3(x+y)-y=24
解方程组(x/4)-(1/3y)=1.3x+4y=12
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(2x-3y=-1 y=2x-1 ) 2(2x+5y=12 2x+3y=6 )3(3x-2y=6 2x+3y
解方程组x+y=15 (x+15%x+y+10%y)=17
解方程组;(x-1)(y-2)=xy,x(x+2)-4y(y-1)=(x+2y)(x-2)
解方程组 2x+y=(4x-y-1)/2=(10+6x+2y)/4
解方程组:4(x+1)=3(y+3) x-2y=7y-6x/3
解方程组 4(x-y-1)=3(1-y)-2 3x+2y=12