📚 Solving Linear Equations: Cambridge KS3 Maths p124_2 | 解一元一次方程：剑桥 KS3 数学 p124_2
Linear equations are the foundation of algebra in the Cambridge Lower Secondary programme. The exercise in p124_2.pdf focuses on equations that contain brackets, variables on both sides, and small fractional coefficients. This article explains the complete method, using the style of question 2 as a worked model.
一元一次方程是剑桥初中数学代数的基础。p124_2.pdf 中的练习重点考查含有括号、两边含有未知数以及简单分数系数的方程。本文以第 2 题的题型为例，完整讲解解题方法。
1. Understanding the Question | 理解题意
The question in p124_2.pdf asks you to solve an equation for the unknown x. A typical example is 2(3x – 1) = 4(x + 2). Solving means finding every value of x that makes the left-hand side equal to the right-hand side.
p124_2.pdf 中的题目要求解出未知数 x。一个典型例子是 2(3x – 1) = 4(x + 2)。解方程意味着找出所有使左边等于右边的 x 值。
Read the question twice. Underline the brackets and any like terms before starting. This helps you choose the correct first step.
请把题目读两遍。开始
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