Question 61136
4X +2Y =3 ----    EQN.1

X =-Y  => X+Y =0----    EQN.2
MULTIPLY EQN.2 BY 4
4X + 4Y =0----  eQN.3
-2Y = 3   =>  Y=- 3/2   (EQN 3 - EQN 1) 
PLUGGING THE VALUE OF Y IN EQN 2 WE GET
X= -Y = -(-3/2) =3/2
SOLUTION IS X=3/2 & Y=-3/2
GOOD LUCK!!!