三轮货车和小轿车有9辆,有30个轮子。三轮货车和小轿车各有几辆?7_(E8|0~
算式:提示0V'm2y)C7_(E8|0~
答:三轮货车'Y'T7n+R7W5?:U.^9k辆,小轿车2J4G8s)l/m辆。7_(E8|0~