填空题 A farmer has a total of 224 animals. He has 38 more sheep than cows and 6 more cows than pigs. How many pigs does he have?
【正确答案】
【答案解析】58[解析] 该题可通过简单的一元方程式得出：设这位农民有X头牛，那么他有(38+X)只羊和(X-6)头猪，X+(38+X)+(X-6)=224，可得出这位农民有64头牛，因此他有(X-6)=58头猪。