解方程组{2x+3y=-1,x/0.2+y/0.3=1
解方程组{2x+3y=-1,x/0.2+y/0.3=1
解方程组(1)x/2+y/3=2 0.2x+0.3y=2.8
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组:解方程组:|X+Y|=1|X|+2|Y|=3
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{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
数学书解方程组{2(x+y)-(x-y)=3,(x+y)-2(x-y)=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51