作业帮解方程｛y=3x=2,3x+y=8 {3x+2y=8,7x+4y=15
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
解方程｛y=3x=2,3x+y=8 {3x+2y=8,7x+4y=15
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
9y=3x-(x-1),4(x+y)-(2x+4)=8y
已知2x+2y=-8,4x+y=15求（x-y)^-(3x+2y)^
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
解方程 1.y=3x＋2 y＋3x=8 2.2x=3y 4x-3y=4 3.3x＋2y=3 2y=3x-1