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To solve the equation \( 17 = z - (-9) \):

1. Simplify the right-hand side by noting that subtracting a negative is the same as adding:
   \[ 17 = z + 9 \]

2. Isolate \( z \) by subtracting 9 from both sides of the equation:
   \[ 17 - 9 = z \]

3. Perform the subtraction:
   \[ 8 = z \]

Therefore, the solution is:
\[ z = 8 \]

Would you like more details or have any questions about this solution?

Here are some related questions for further practice:
1. Solve \( 25 = z - (-5) \).
2. Solve \( 10 = z - (-2) \).
3. Solve \( 30 = z - (-10) \).
4. Solve \( 50 = z - (-20) \).
5. Solve \( 100 = z - (-50) \).

**Tip:** Remember that subtracting a negative number is equivalent to adding the absolute value of that number.

Learn how to solve the equation 17 = z - (-9) with a step-by-step breakdown. This algebra problem involves simplifying the expression by recognizing that subtracting a negative number is equivalent to addition. Ideal for students in Grades 6-8.

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