Algebra-1

Question Analysis
This question tests the student's ability to solve a literal equation for a specific variable. The equation given is the perimeter of a rectangle, and the goal is to isolate the variable in terms of and .

Key Concept Explanation
The key concept here is the use of properties of equality to isolate the desired variable. This involves performing the same operations on both sides of the equation to maintain balance.

Step-by-step Solution
1. Start with the given equation:
2. Subtract from both sides to isolate the term with