The given system of equations is:
y = 1/2x - 6
x = -4
To find the solution to the system of equations, we need to substitute the value of x = -4 into the first equation and solve for y.
Substituting x = -4 into the equation y = 1/2x - 6:
y = 1/2(-4) - 6
y = -2 - 6
y = -8
Therefore, the solution to the system of equations is (-4, -8), which corresponds to the values of x and y respectively.
So, the correct answer is option b. (-4, -8).
