这个题，换我做，只有“设x”，列方程式了～怎么跟我们小时候学的不一样呢？\\#可儿 #小学数学{"simpleText":"Sign in"}{"simpleText":"Sign in"}{"runs":[{"text":"Save"}]}Want to watch this again later?小明姓明{"simpleText":"Personalized"}{"simpleText":"None"}{"runs":[{"text":"Unsubscribe"}]}小明姓明?小明姓明?{"runs":[{"text":"Comments are turned off. "Learn more30:16{"content":"Adam Eschborn"}{"content":"28M views"}{"content":"7 years ago"}16:57{"content":"樂享養生"}{"content":"204K views"}{"content":"2 weeks ago"}27:19{"content":"小Lin说"}{"content":"4.3M view
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