Algebra-1

Question Analysis
This question tests the student's ability to use the elimination method by multiplying one equation and then adding the two equations to eliminate one variable.

Key Concept Explanation
The elimination method involves making the coefficients of one variable equal or opposite before adding or subtracting the equations.

Step-by-step Solution
1. Multiply the first equation by 2: , which gives .
2. Add the two equations: .
3. Simplify: . Solve for x: