Question

ResoX+Y=0 X-Y=2 me ajudar {

Answer 1

X+Y=0

X-Y=2 (+)

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2x = 2

x = 2/2

x = 1

X + y = 0

1 + y = 0

y = - 1

R.:

x = 1

y = - 1

Answer 2

X + Y = 0

X - Y = 2

X = 2 +Y

2 + Y + Y = 0

2Y = -2

Y= -1

X + (-1) = 0

X = 1

X = 1 E Y = -1