21rostjos
21rostjos
11-04-2017
Mathematics
contestada
X-y=3
X+2y=-6
Plz get it right
Respuesta :
apologiabiology
apologiabiology
11-04-2017
x-y=3
x+2y=-6
solve for x in first
x-y=3
x=y+3
sub y+3 for x in other
(y+3)+2y=-6
y+3+2y=-6
3y+3=-6
minus 3 both sides
3y=-9
divide by 3
y=-3
sub back
x=y+3
x=-3+3
x=0
(x,y)
(0,-3)
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