某牧场有岩羊30只，山羊的只数是岩羊的3倍，绵羊比山羊多10只，绵羊有多少只？*n:I'n0\,W2J,K6N.x;U
算式：提示7[-J2m3E'e*n:I'n0\,W2J,K6N.x;U
答：绵羊有,f(x4N;M4`;m2^2@4R.W只。*n:I'n0\,W2J,K6N.x;U