Question

me ajudem por favor!!!! ( e so a 2 )

Answer 1

X +Y=3
4X+Y=-3 (-1)
X+Y=3
-4X-Y=3
_______
-3X = 6
X=-2
CALCULANDO Y
Y=3-X
Y=3-(-2)
Y=3+2
Y=5

LETRA B
X-Y=100
X+Y=400
_______
2X=500
X=500÷2
X= 250
Y=400-X
Y=400-250
Y= 150

Answer 2

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