Question

-x - y = 1
3x - 4y = -17
Método reducción

Answer 1

-x -y = 1 (3)

3x - 4y = -17

-3x -3y = 3

3x -4y = -17

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/ -7y = -14

y = 2

-x -2 = 1

-x = 1 + 2

-x = 3

x = -3