One-Step Equations Addition and Subtraction Worksheets - Math Monks - Free Printable

Sure! Let’s solve each of the 18 equations step by step. The goal is to solve for x in each equation using basic algebra — that means isolating x on one side of the equation by performing inverse operations.

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🔢 Equation 1: `x + 27 = 48`

Subtract 27 from both sides:
> x = 48 - 27
> x = 21

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🔢 Equation 2: `x + 10 = 17`

Subtract 10 from both sides:
> x = 17 - 10
> x = 7

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🔢 Equation 3: `x - 73 = 17`

Add 73 to both sides:
> x = 17 + 73
> x = 90

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🔢 Equation 4: `x - 73 = 144`

Add 73 to both sides:
> x = 144 + 73
> x = 217

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🔢 Equation 5: `10 - x = 77`

Subtract 10 from both sides:
> -x = 77 - 10 → -x = 67
Multiply both sides by -1:
> x = -67

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🔢 Equation 6: `x + 1 = 9`

Subtract 1 from both sides:
> x = 9 - 1
> x = 8

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🔢 Equation 7: `5 - x = 12`

Subtract 5 from both sides:
> -x = 12 - 5 → -x = 7
Multiply by -1:
> x = -7

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🔢 Equation 8: `2 = x + 12`

Subtract 12 from both sides:
> 2 - 12 = x → x = -10

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🔢 Equation 9: `x - 8 = 19`

Add 8 to both sides:
> x = 19 + 8
> x = 27

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🔢 Equation 10: `x - 22 = 30`

Add 22 to both sides:
> x = 30 + 22
> x = 52

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🔢 Equation 11: `13 = x + 4`

Subtract 4 from both sides:
> 13 - 4 = x → x = 9

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🔢 Equation 12: `x - 4 = 5`

Add 4 to both sides:
> x = 5 + 4
> x = 9

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🔢 Equation 13: `x - 17 = 22`

Add 17 to both sides:
> x = 22 + 17
> x = 39

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🔢 Equation 14: `x + 13 = 27`

Subtract 13 from both sides:
> x = 27 - 13
> x = 14

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🔢 Equation 15: `24 = x + 15`

Subtract 15 from both sides:
> 24 - 15 = x → x = 9

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🔢 Equation 16: `x - 7 = 14`

Add 7 to both sides:
> x = 14 + 7
> x = 21

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🔢 Equation 17: `x + 22 = 20`

Subtract 22 from both sides:
> x = 20 - 22
> x = -2

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🔢 Equation 18: `15 = x + 10`

Subtract 10 from both sides:
> 15 - 10 = x → x = 5

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## ✔ Final Answers:

| # | Equation | Solution |
|----|--------------------|--------|
| 1 | x + 27 = 48 | 21 |
| 2 | x + 10 = 17 | 7 |
| 3 | x - 73 = 17 | 90 |
| 4 | x - 73 = 144 | 217|
| 5 | 10 - x = 77 | -67|
| 6 | x + 1 = 9 | 8 |
| 7 | 5 - x = 12 | -7 |
| 8 | 2 = x + 12 | -10|
| 9 | x - 8 = 19 | 27 |
| 10 | x - 22 = 30 | 52 |
| 11 | 13 = x + 4 | 9 |
| 12 | x - 4 = 5 | 9 |
| 13 | x - 17 = 22 | 39 |
| 14 | x + 13 = 27 | 14 |
| 15 | 24 = x + 15 | 9 |
| 16 | x - 7 = 14 | 21 |
| 17 | x + 22 = 20 | -2 |
| 18 | 15 = x + 10 | 5 |

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## 📝 Summary:

To solve these equations, we used inverse operations:
- If a number is added to x → subtract it from both sides.
- If a number is subtracted from x → add it to both sides.
- If x is being subtracted (like 10 - x), move constants first, then multiply by -1 if needed.

Let me know if you want a worksheet with these answers filled in or need explanations for any specific problem! 😊