第 1 題
1 分Solve the linear equation \( 8x + 5 = 21 \).
Key Stage 3 (KS3) · Mathematics
Linear Equations：練習題
5 條多項選擇題即時批改，另有 4 條文字題附完整解題步驟，全部圍繞「Linear Equations」。
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第 2 題
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 題
1 分Solve the linear equation \( 4(x - 3) = 20 \).
第 4 題
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 題
1 分Solve the linear equation:
\( 9 - 4x = 25 \)
第 6 題
3 分Solve the linear equation \( \frac{2x - 3}{5} = 3 \) for \( x \).
先自己寫一次答案，再對照解題步驟。
第 7 題
5 分Solve the linear equation \( 3(2x - 5) = 4x + 7 \) for \( x \).
先自己寫一次答案，再對照解題步驟。
第 8 題
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 \( y = 2x^2 - 15 \).
先自己寫一次答案，再對照解題步驟。
第 9 題
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.
先自己寫一次答案，再對照解題步驟。
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