一条绳子，用去3.6米后，剩下的比用去的多2.85米。这条绳子原来长多少米？(i)x+y+B;[7y
算式：提示7A8?({1t9h.B;\1I,^)q-z'N-D.W:i4q3l(i)x+y+B;[7y
答：这条绳子原来长4{8]:M/{;\2v/K.n2R(M米。(i)x+y+B;[7y