Linear equations in one variable
Moving terms, combining like terms, isolating the coefficient — the three basic moves.
Definition
一元一次方程形如 `ax + b = 0`(a ≠ 0)。解法是等式性质的应用:两边同加减、同乘除(除数不为 0),把 x 逐步孤立出来。
Key formulas
- 解
Common mistakes
- 移项忘记变号
- 两边同乘负数时不等号方向(不等式才需要)
- 除以 0
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