第 1 题
1 分Solve the linear equation \( 8x + 5 = 21 \).
Key Stage 3 (KS3) · Mathematics
Linear Equations：练习题
5 道选择题即时批改，另有 4 道文字题附完整解题步骤，全部围绕「Linear Equations」。
9 道题目20 分免费，无需注册
第 2 题
1 分A rectangular field has a length of \( (2x + 5) \) m and a width of \( (x - 2) \) m. If the perimeter is 42 m, find the value of \( x \).
第 3 题
1 分Solve the linear equation \( 4(x - 3) = 20 \).
第 4 题
1 分The sum of three consecutive integers is 72. Let the smallest integer be \( n \). Which equation can be used to find the value of \( n \)?
第 5 题
1 分Solve the linear equation:
\( 9 - 4x = 25 \)
第 6 题
3 分Solve the linear equation \( \frac{2x - 3}{5} = 3 \) for \( x \).
先自己写一遍答案，再对照解题步骤。
第 7 题
5 分Solve the linear equation \( 3(2x - 5) = 4x + 7 \) for \( x \).
先自己写一遍答案，再对照解题步骤。
第 8 题
3 分Consider the linear equation:
\( 7(x - 2) = 3x + 10 \)
(a) Solve the equation for \( x \).
(b) Using the value of \( x \) found in part (a), find the value of \( y \) if \( y = 2x^2 - 15 \).
先自己写一遍答案，再对照解题步骤。
第 9 题
4 分The sum of three consecutive integers is 72.
(a) If the smallest integer is \( x \), write an equation to represent this information.
(b) Solve the equation to find the three integers.
先自己写一遍答案，再对照解题步骤。
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