Set of one-step algebraic equations designed to help students practice isolating the variable x.

Let's solve each of the given equations step by step. These are all linear equations in one variable, and we'll isolate $ x $ to find its value.

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3) $ x - 3 = 11 $

Add 3 to both sides:
$$
x = 11 + 3 = 14
$$
Answer: $ x = 14 $

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4) $ x - 5 = 7 $

Add 5 to both sides:
$$
x = 7 + 5 = 12
$$
Answer: $ x = 12 $

---

5) $ 2x = 10 $

Divide both sides by 2:
$$
x = \frac{10}{2} = 5
$$
Answer: $ x = 5 $

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6) $ \frac{x}{6} = 2 $

Multiply both sides by 6:
$$
x = 2 \times 6 = 12
$$
Answer: $ x = 12 $

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7) $ 3x = 15 $

Divide both sides by 3:
$$
x = \frac{15}{3} = 5
$$
Answer: $ x = 5 $

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8) $ 4x = 12 $

Divide both sides by 4:
$$
x = \frac{12}{4} = 3
$$
Answer: $ x = 3 $

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9) $ \frac{x}{4} = 10 $

Multiply both sides by 4:
$$
x = 10 \times 4 = 40
$$
Answer: $ x = 40 $

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10) $ x - 7 = 13 $

Add 7 to both sides:
$$
x = 13 + 7 = 20
$$
Answer: $ x = 20 $

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11) $ x + 6 = 15 $

Subtract 6 from both sides:
$$
x = 15 - 6 = 9
$$
Answer: $ x = 9 $

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12) $ 4 + x = 9 $

Subtract 4 from both sides:
$$
x = 9 - 4 = 5
$$
Answer: $ x = 5 $

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13) $ 7 = x - 6 $

Add 6 to both sides:
$$
7 + 6 = x \Rightarrow x = 13
$$
Answer: $ x = 13 $

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14) $ 14 = x + 5 $

Subtract 5 from both sides:
$$
x = 14 - 5 = 9
$$
Answer: $ x = 9 $

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✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 3) | $ x = 14 $ |
| 4) | $ x = 12 $ |
| 5) | $ x = 5 $ |
| 6) | $ x = 12 $ |
| 7) | $ x = 5 $ |
| 8) | $ x = 3 $ |
| 9) | $ x = 40 $ |
| 10) | $ x = 20 $ |
| 11) | $ x = 9 $ |
| 12) | $ x = 5 $ |
| 13) | $ x = 13 $ |
| 14) | $ x = 9 $ |

Let me know if you'd like these explained visually or with steps shown in a different format!