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一元一次方程:含有一個未知數,未知數的次數為1次的整式方程叫做一元一次方程 比如:2x+3=7,含有一個未知數x,x的次數為1,等號左邊2x+3與等號右邊7都是整式 所以這樣的方程就是一元一次方程 但2/x+3=7,雖然含有一個未知數x,但等號左邊2/x+3不是整式,所以不是一元一次方程
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