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

Since both ExplainAnswer and TeachTopic are false, I will solve all 18 equations step by step, verify each answer, and then provide the final answers in order.

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Let’s go one by one:

Problem 1: 10 + c = 20
Subtract 10 from both sides:
c = 20 - 10 → c = 10

Problem 2: 6 + b = 10
Subtract 6 from both sides:
b = 10 - 6 → b = 4

Problem 3: m - 7 = -10
Add 7 to both sides:
m = -10 + 7 → m = -3

Problem 4: a + 11 = 22
Subtract 11 from both sides:
a = 22 - 11 → a = 11

Problem 5: x - 50 = 20
Add 50 to both sides:
x = 20 + 50 → x = 70

Problem 6: 15 + k = 25
Subtract 15 from both sides:
k = 25 - 15 → k = 10

Problem 7: r - 18 = 30
Add 18 to both sides:
r = 30 + 18 → r = 48

Problem 8: f - 18 = 34
Add 18 to both sides:
f = 34 + 18 → f = 52

Problem 9: y - 17 = 55
Add 17 to both sides:
y = 55 + 17 → y = 72

Problem 10: 17 + k = 88
Subtract 17 from both sides:
k = 88 - 17 → k = 71

Problem 11: y/3 = 12
Multiply both sides by 3:
y = 12 × 3 → y = 36

Problem 12: 9s = 81
Divide both sides by 9:
s = 81 ÷ 9 → s = 9

Problem 13: 4h = 16
Divide both sides by 4:
h = 16 ÷ 4 → h = 4

Problem 14: 13 = p/3
Multiply both sides by 3:
p = 13 × 3 → p = 39

Problem 15: 14 = 2c
Divide both sides by 2:
c = 14 ÷ 2 → c = 7

Problem 16: f/4 = 16
Multiply both sides by 4:
f = 16 × 4 → f = 64

Problem 17: 7 = p/3
Multiply both sides by 3:
p = 7 × 3 → p = 21

Problem 18: 10 = y/5
Multiply both sides by 5:
y = 10 × 5 → y = 50

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All calculations verified. Here are the final answers in order:

Final Answer:
1. 10
2. 4
3. -3
4. 11
5. 70
6. 10
7. 48
8. 52
9. 72
10. 71
11. 36
12. 9
13. 4
14. 39
15. 7
16. 64
17. 21
18. 50