Algebra-1

Question Analysis
This question tests the student's ability to use the elimination method to solve a system of linear equations. The key step is to add the two equations to eliminate one variable, in this case, .

Key Concept Explanation
The elimination method involves adding or subtracting the equations to eliminate one of the variables, making it easier to solve for the other variable.

Step-by-step Solution
1. Identify the system of equations:
2. Add the two equations to eliminate :