Algebra-1

Question Analysis
This question tests the student's ability to solve a system of linear equations using the elimination method. The given system of equations is simple and can be solved by adding and subtracting the equations.

Key Concept Explanation
The key concept here is the elimination method, where the equations are manipulated to eliminate one variable, allowing the other variable to be solved. Once one variable is found, it can be substituted back into one of the original equations to find the other variable.

Step-by-step Solution
1. Add the two equations:
2. Simplify:
3. Solve for :
4. Substitute

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