蛐蛐和蜘蛛共8只，腿54条，蛐蛐和蜘蛛各几只？2x*k9r)U8a7Q+Q9W/~+p*m-d
算式：提示.i+o,Q5P)Y(d2x*k9r)U8a7Q+Q9W/~+p*m-d
答：蛐蛐有3{4P/|+Q:x(h.u6e/r只，蜘蛛有-j6q8_.g*[3K1F(u:\5t9p2^只。2x*k9r)U8a7Q+Q9W/~+p*m-d