Answer:
B
Step-by-step explanation:
you have a system of equations with altogether 3 variables.
that means any solution looks like a 3- dimensional point with 3 coordinates : (x, y, z)
the problem is, you have only 2 equations.
2 equations with 3 variables is similar to 1 equation and 2 variables : there are infinitely many solutions.
the only thing we need to check, if the 2 equations are kind of blocking or contradicting each other (to have no solution).
but I can do a "multiply the first equation by -2 and then add both equations" :
-2x - 6y - 2z = -160
7y + 2z = 28
-----------------------------
-2x + y = -132
it works well, nothing special came up. the resulting equation is possible. so, no contradiction. just infinitely many solutions.