Answer:
b
Step-by-step explanation:
What topic is this? And when is it due?
Answer:
1.4
Step-by-step explanation:
For this case we have the following system of equations:

We multiply the first equation by -4:

We have the following equivalent system of equations:

We add the equations:

We find the value of the variable "x":

Thus, the solution of the system is:

See the graphic in the attached image
ANswer:

See the graphic in the attached image