Step-by-step explanation:
2x+3y= -2.......... 1
3x - 6y = 18......... 2
Multiply both Sides of equation 1 by 2
4x + 6y = -4
3x - 6y = 18 
(add Like terms) 
7x = 14 (devide both Sides by 7)
.°. x = 2 
Substitude x = 2 into equation 1
.°. 2(2) + 3y = -2 (multiple the digit)
 4 + 3y = -2 (Move 4 to the right and change it's sign)
 3y = -6 (devide both side by 3)
 y = -2
 
Final answers x = 2 ; y = -2
 {2 ; -2}