The slope for both the line is m= 1/3 and  they are parallel lines , Option B and C are correct two options
The first equation is
 y = (1/3)x-4 and not y = -x-4
(if the equation is not corrected then it will not have two true statements)
A system of equation is a set of equation which have a common solution
The given system of equation is
y = (1/3)x-4
3y -x = -7
3y = x-7
As it can seen from the standard equation of a line that
y =mx+c
so slope for both the line is m= 1/3
Therefore they are parallel lines
Thus , Option B and C are correct two options
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