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x=0
2=y
2x + 3y = -6
2x = -6-3y
x = ( -6-3y)/2
2x-y = -2
2x = -2+y
x= ( -2+y)/2
∵ Igualamos las " x" :
(-6-3y) /2 = (-2+y)/2
-6 -3y = -2+y
-6 +2 = y+3y
- 4= 4y
- 1 = y
∵ Hallamos "x" :
x= ( -2+y)/2
x= ( -2 -1) /2
x= -3/2
Espero te sirva !! ^^