Algebra-1

Question Analysis
This question tests the student's ability to solve a system of linear equations using either the substitution or elimination method. The problem is designed to be at a hard level, requiring application and analysis skills.

Key Concept Explanation
The key concept is the solution to a system of equations, which is the point where the graphs of the equations intersect. This point satisfies both equations simultaneously.

Step-by-step Solution
1. Start with the given system of equations:
2. Solve the second equation for :



3. Substitute into the first equation:
4. Simplify and solve for :

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