3y+1/3=y+7/6

1.5y+8y-6y=2y-3 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 x+y=3 x+2y=9 3/x+1=y y-x=3 y=2x-3 y-3x=1 2(x+1)-y=6 7x-5y=-9 (3y-1)/4-1=(5y-7)/6 9y-3-3=10y-14 9y-10y=-14+3+3 -y=-8 y=8 2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组 2(x+y)-3(x-y) =1 6(x+y)+7(x-y)=51大神们帮帮忙 解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 解3y+5/3y-6=1/2+5y-4/2y-4 ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 解方程,3y^3+(y+3)(6-2y)+3y(y+2)(2-y)-2(y^2+1)=0