2(x-y)/3-x+y/4=-1和6(x+y)-4(2x-y+2)=16要过程,用整体带入,快

(2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0 （X+Y)^2 X^2Y+XY^2注：*/* 是分数 (x-2y)(x+y)-2x(-2x-3y)+6x(-x-y),其中x=-1,y=2要讲解和答题 2x+4y=3 -3x-2y=1 ..求x和y 已知X和Y满足3X+4Y=2,X-Y-1/7 解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51 {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 分解因式:(x+1)(x+2)(x+3)(x+4)+1已知x*x+2x+y*y-6y+10=0 求X的Y次方已知X和Y为相反数.且XY=-1/4 求代数式x*x*x*y+2x*x*y*y+x*y*y*y的值把第一题写清楚一点哦,另外请教下,幂怎么在电脑上打出来? 2(x-y)/3-x+y/4=-1和6(x+y)-4(2x-y+2)=16要过程,用整体带入,快 求x和y,（1）3x+4y=5 （2）-7x+9y=-6 (3)3x-y=9