Assuming the system is composed of the equations y = 5x+7 and x = 8, then the answer is (8,47) which is choice A
To get this answer, we simply replace x in the first equation with 8, and then compute
y = 5x+7
y = 5*8+7 .... replace x with 8
y = 40+7
y = 47
So together x = 8 and y = 47 pair up to get us the solution (x,y) = (8,47)
