解方程组:2x+y=15,2x-3y=-1
解方程组:{x+|3x-y|+3y=15 2x+y=6
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:2(x+y)-3(x-y)=34(x+y)+3x=15+3y.
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
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
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
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