Answer:
x = -2 and y = -5
Explanation:
Given the system of equation:
3x - 3y = 9 ⇒(1)
5x + 3y = -25 ⇒(2)
From (1) ⇒ 3x - 9 = 3y ⇒(3)
Substitute with the value of (3y) from (3) at (2)
5x + (3x - 9) = -25
5x + 3x - 9 = -25 Combine like terms
8x = -25 + 9 = -16
x = -16/8 = -2
Substitute with the value of x at (3)
3y = 3x - 9
3y = 3 * -2 - 9
3y = -6-9
3y = -15
y = -15/3 = -5
∴ x = -2 and y = -5