Step 1 :Given the system of equations: \[\begin{array}{l} 7x + 2y = -49 \ -x + y = 16 \end{array}\]
Step 2 :We can express one variable in terms of the other from one equation and substitute this expression into the other equation. From the second equation, we can express y in terms of x: \(y = x + 16\)
Step 3 :Substitute \(y = x + 16\) into the first equation, we get: \(7x + 2(x + 16) = -49\)
Step 4 :Solving this equation, we find that \(x = -9\)
Step 5 :Substitute \(x = -9\) back into the equation \(y = x + 16\), we find that \(y = 7\)
Step 6 :\(\boxed{x = -9}\) and \(\boxed{y = 7}\) are the solutions to the system of equations