It seems you're presenting a system of equations:

1. \( x - y + 1 \)
2. \( x + y = 3 \)

To clarify, do you mean the first equation to be: 
\[ x - y + 1 = 0 \] 
or is it simply \( x - y + 1 \) by itself? 

If it is \( x - y + 1 = 0 \), the system would be:
1. \( x - y + 1 = 0 \)
2. \( x + y = 3 \)

Let me know so I can solve it for you!

Learn how to solve the system of equations x - y + 1 = 0 and x + y = 3 using algebraic methods such as substitution and elimination. This problem is ideal for students in Grades 7-10 looking to strengthen their understanding of linear equations.

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