Question

Use the substitution method to solve the system. {m+n=5m−n=3 What is the solution? The solution is (4, 1). There is no solution. There are an infinite number of solutions. The solution is (2, −1).

Answer 1

The answer would be

The solution is (4, 1)

Answer 2

Hint:  $\bf \begin{cases} m+n=5\to &m=\boxed{5-n} \\ \quad \\ \quad \\ m-n=3\to &\boxed{5-n}-n=3\quad \impliedby \textit{solve for "n"} \end{cases}$