Solve the system of equations by graphing.
\[
\begin{array}{l}
x-y=7 \\
x+y=-1
\end{array}
\]

Answer

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Answer

\(\boxed{x=3, y=-4}\)

Steps

Step 1 ：\(x-y=7\) and \(x+y=-1\)

Step 2 ：Add the two equations: \(2x = 6\)

Step 3 ：Divide by 2: \(x = 3\)

Step 4 ：Substitute x into the first equation: \(3-y=7\)

Step 5 ：Subtract 3: \(-y=4\)

Step 6 ：Multiply by -1: \(y=-4\)

Step 7 ：\(\boxed{x=3, y=-4}\)