Algebra-1

Question Analysis
This question tests the student's ability to solve a one-step equation by using the inverse operation of subtraction.

Key Concept Explanation
To isolate the variable , we need to add 9 to both sides of the equation. This is based on the principle that adding or subtracting the same number from both sides of an equation maintains the equality.

Step-by-step Solution
1. Start with the equation:
2. Add 9 to both sides:

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