Answer: C
Step-by-step explanation:
x + y = 1 , so x = 1- y. If you substitute this into the other equation you get:
3*(1 -y) -5y = 19
3 - 3y -5y = 19
-8y = 19-3
-8y = 16
-y = 16/8
-y = 2
y = 2 , now you can substitute y =2 into x = 1-y to get x:
x = 1 - (-2) =1+2= 3 , x =3
So the final answer is : (3,-2)
