Algebra-1

Question Analysis
This question tests the student's ability to solve a system of linear equations using the substitution method. =

Key Concept Explanation
The solution to a system of equations is an ordered pair that satisfies all the equations simultaneously. In this case, we need to find the value of that makes both equations true.

Step-by-step Solution
1. Start with the given system of equations:
2. Use the second equation to express in terms of :
3. Substitute into the first equation: