Answer:
C. (3, -2)
Explanation:
x + y = 1 ➡ x = 1 - y we can use this information in the first equation to find the value of y
3x - 5y = 19 replace x with 1 - y
3 ×(1-y) - 5y = 19 ➡ 3 - 3y - 5y = 19 add like terms
-8y = 16
y = -2 if y is 2 then x is
x + y = 1 ➡ x +(-2) = 1 and x = 3