Let's solve each of the two-step equations step by step, following the method shown in the example:
using inverse operations to isolate the variable.
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🔹 Example Review (from worksheet):
We are given:
- $ 2x + 5 = 21 $
- $ 5 + \frac{y}{6} = 13 $
#### Example 1: $ 2x + 5 = 21 $
1. Subtract 5 from both sides:
$$
2x = 16
$$
2. Divide both sides by 2:
$$
x = 8
$$
#### Example 2: $ 5 + \frac{y}{6} = 13 $
1. Subtract 5 from both sides:
$$
\frac{y}{6} = 8
$$
2. Multiply both sides by 6:
$$
y = 48
$$
Now let’s apply this method to the problems.
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✔ Problem 1: $ \frac{n}{4} + 3 = 2 $
We want to isolate $ n $.
1.
Subtract 3 from both sides:
$$
\frac{n}{4} = 2 - 3 = -1
$$
2.
Multiply both sides by 4:
$$
n = -1 \times 4 = -4
$$
✔ Answer: $ n = -4 $
---
✔ Problem 2: $ 3d + 4 = 16 $
1.
Subtract 4 from both sides:
$$
3d = 12
$$
2.
Divide both sides by 3:
$$
d = 4
$$
✔ Answer: $ d = 4 $
---
✔ Problem 3: $ \frac{c}{2} - 5 = 25 $
1.
Add 5 to both sides:
$$
\frac{c}{2} = 30
$$
2.
Multiply both sides by 2:
$$
c = 60
$$
✔ Answer: $ c = 60 $
---
✔ Problem 4: $ 8b + 5 = 29 $
1.
Subtract 5 from both sides:
$$
8b = 24
$$
2.
Divide both sides by 8:
$$
b = 3
$$
✔ Answer: $ b = 3 $
---
✔ Problem 5: $ 5d - 11 = 24 $
1.
Add 11 to both sides:
$$
5d = 35
$$
2.
Divide both sides by 5:
$$
d = 7
$$
✔ Answer: $ d = 7 $
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✔ Problem 6: $ \frac{m}{4} - 2 = 5 $
1.
Add 2 to both sides:
$$
\frac{m}{4} = 7
$$
2.
Multiply both sides by 4:
$$
m = 28
$$
✔ Answer: $ m = 28 $
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✔ Final Answers:
1. $ n = -4 $
2. $ d = 4 $
3. $ c = 60 $
4. $ b = 3 $
5. $ d = 7 $
6. $ m = 28 $
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Let me know if you'd like these written neatly for a worksheet!
Parent Tip: Review the logic above to help your child master the concept of step 8 worksheets.