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2x+18=7x－2解方程？

2025-03-15 17:56:57

推荐回答（4个）

回答1：

由题意得，这是一道方程题，给方程下定义：方程式含有未知数的等式，可知方程有一个未知数，并且未知数的次数是一，所以是一元一次方程。
先移项：2X-7X=-2-18。合并同类项：-5X=-20。系数化为一：x=-20÷（-5）=4。所以方程的解x=4。代入方程验算一下，左边等于2×4+18=26，右边等于7×4-2=26，左式＝右式。所以结果正确！

回答2：

解：7x－2x＝18+2
5x＝20
x＝20÷5
x＝4

回答3：

2x+18=7x－2
18+2=7x-2x
5x=20
x=4

回答4：

2 x+18=7 x-2
7 x-2 x=18+2
5 x=20
X=4
希望能帮助到你。

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