Answer:
x = -10 , y = -45
Step-by-step explanation:
y + 4x = -5 ------------- (i)
2y = -8x - 20 ---------- (ii)
y + 4x = -5 --------(iii) × -2
2y + 8x = -20 -----(iv) × +1
-2y - 8x = + 10
2y + 8x = -20
x = -10
substitute x = -10 into equation (i)
y + 4x = -5
y + 4 (-10) = -5
y + 40 = -5
y = -5 - 40
y = -45
