已知两变量x,y满足2x-3y=5,则y= 已知两变量x,y满足2x-3y=5,则y=

已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x,y满足约束条件 y≤2 x+y≥1 x-y≤1 则z=3x+y的最大值是 已知变量x,y满足约束条件：x+y≧1,y≦3,x-y≦1,若z=Kx+y最大值为5,则实数k 变量x,y满足x-2y=0,x 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 已知变量X,Y满足(3X+Y)^2=(3X-Y)^2+24,则X,Y是否成反比例?请说明理由 已知变量X.Y满足 设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2 若变量x,y满足约束条件-1≤x:x≤y;3x+2y≤5,则z=2x+y的最大值为 设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x 已知变量x、y满足x-y-2≤0,x+2y-5≥0,y-2≤0,则m=（2x-y-1）/（x+2y+1）的取值范围是? 已知变量x,y满足(2x-y)^2=4x^2+y^2+6,则x,y是否成反比例?说明理由