Question

ayuda plis #ayudameplis :)............................​

Answer 1

Respuesta:

{ x + y = 3

2x + y = 2 }

x + y = 3

y = 3 - x

2x + y = 2

2x + 3 - x = 2

2x - x = 2 - 3

x = -1

y = 3 - x

y = 3 - (-1)

y = 3 + 1

y = 4

x = -1, y = 4

{ 2x + y = 1

-2x + 3y = 19 }

2x + y = 1

2x = 1 - y

(-1)(2x) = (-1)(1 - y)

-2x = -1 + y

-2x = y - 1

-2x + 3y = 19

y - 1 + 3y = 19

y + 3y = 19 + 1

4y = 20

y = 20/4

y = 5

2x + y = 1

2x = 1 - y

2x = 1 - 5

2x = -4

x = -4/2

x = -2

x = -2, y = 5