Explanation:
Let x represent the lesser number and y represent the greater number. 
x + 2y = 8
y + 2x = -6 
Subtract equation 1 from equation 2: 
3x = -14 
x = -14/3 
Substitute x = -14/3 into equation 1:
-14/3 + 2y = 8 
2y = 22/3 
y = 11/3
The lesser number is x = -14/3 and the greater number is y = 11/3.