Algebra-1

Question Analysis
This question tests the student's ability to solve a one-step equation involving subtraction. The goal is to isolate the variable by adding 15 to both sides of the equation.

Key Concept Explanation
The key concept here is the use of inverse operations. To undo the subtraction, we add the same number to both sides.

Step-by-step Solution
1. Start with the equation:
2. Add 15 to both sides:

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