Final answer:
The system of equations 7y+28=-3x and x+4y=-32 has a single solution, as the two lines are not parallel, which means they intersect at one point.
Step-by-step explanation:
To determine how many solutions the system of equations has, we need to analyze the two given equations: 7y+28=-3x and x+4y=-32.
First, let's rewrite the first equation in slope-intercept form (y=mx+b):
7y = -3x - 28
y = -x - 4
And the second equation:
x = -4y - 32
x = -4(y + 8)
Then, we check if the two lines are parallel, identical, or intersecting. As the coefficients of x and y are not multiples of each other, the lines are not parallel. Therefore, the system has a single solution, a point where the two lines intersect.