Answer:
x=3. y =-4
Explanation:
For the given system, we need to merge the equations, and obtain the first variable.
So, the second (x+y= -1) multiply it by -3 and sum it to the first one
5x+3y=3. By doing this, you have the following>
2x=6, thus we obtain that x =3
Knowing that x=3, we can obtain the value for 'y' variable, you must use the other equation, (x+y=-1), from where we obtain that y=-4