题目可能有歧义当 (2x-1)÷xy=k÷3x^2y^3时,k代表的代数式是?(2x-1)/xy *3x^2y^3=kk=(2x-1)* xy^2当2x-(1÷xy)=k÷3x^2y^3 时,k代表的代数式是 ?k=2x *3x^2y^3 -(1÷xy)*3x^2y^3k=6x^3y^3 - 3...