Algebra-1

Question Analysis  
This question involves solving a system of linear equations using the elimination method.  
The main focus is on using subtraction to eliminate since its coefficients are equal, then solving for .  

Key Concept Explanation  
When the coefficients of a variable in two equations are equal (e.g., in both equations here), subtracting the equations eliminates that variable. This reduces the system to a single-variable equation, making it solvable.  

Step-by-Step Solution  
1. Notice the coefficients of are both (equal). Subtract the second equation from the first to eliminate :  
 
2. Simplify: →

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