To solve the equation \( 3(a + 9) = 30 \), follow these steps:

1. **Distribute the 3** to both terms inside the parentheses:
   \[
   3a + 27 = 30
   \]

2. **Isolate the variable term** by subtracting 27 from both sides:
   \[
   3a = 30 - 27
   \]
   Simplify the right side:
   \[
   3a = 3
   \]

3. **Solve for \( a \)** by dividing both sides by 3:
   \[
   a = \frac{3}{3}
   \]
   Simplify the fraction:
   \[
   a = 1
   \]

So, the value of \( a \) is \( \boxed{1} \).

Would you like any more details or have any questions?

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Here are 8 related questions for further practice:

1. Solve for \( b \): \( 2(b + 5) = 20 \).
2. Solve for \( c \): \( 4(c - 3) = 16 \).
3. Solve for \( x \): \( 5(x + 2) = 25 \).
4. Solve for \( y \): \( 6(y + 7) = 54 \).
5. Solve for \( d \): \( 7(d - 1) = 42 \).
6. Solve for \( m \): \( 8(m + 4) = 64 \).
7. Solve for \( z \): \( 9(z - 2) = 36 \).
8. Solve for \( t \): \( 10(t + 6) = 70 \).

**Tip**: When solving equations, always perform the same operation on both sides to maintain equality.

Learn how to solve the equation 3(a + 9) = 30 with a detailed step-by-step solution. This problem covers key algebraic concepts, including distribution and solving linear equations. Suitable for students in Grades 7-9.

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