what is the solutionof the following linear system?

2x + y = -1
x + 1/2y =-1/2

a) (2,1)
b) none
c) (1/2,-2)
d) infinite number of solutions

What does you math book say about linear equations?

These guys will not give you the answer.

A system in which the outputs are components of a vector which is equal to the value of a linear operator applied to a vector whose components are the inputs.