To solve the equation \( r + 4 = 9 \), follow these steps:

1. Subtract 4 from both sides to isolate \( r \):
   \[
   r + 4 - 4 = 9 - 4
   \]
   \[
   r = 5
   \]

So, the solution is \( r = 5 \).

Would you like more details or have any questions?

Here are 5 related questions:
1. What happens if we add a negative number to both sides?
2. How would you solve \( r - 3 = 7 \)?
3. What if the equation was \( r + 4 = 12 \)?
4. How would you solve a similar equation with fractions, like \( r + \frac{1}{2} = 9 \)?
5. What are the steps to solve \( 2r + 4 = 10 \)?

**Tip:** Always perform the same operation on both sides of the equation to keep it balanced.

Learn how to solve the linear equation r + 4 = 9 with a clear step-by-step solution. This problem covers basic algebraic concepts and the use of the addition property of equality. Suitable for students in Grades 6-7.

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