Question

Resolva os sistemas lineares e encontre os valores de x e y

Answer 1

d) {-12x - y = 33

{7x - 8y = 58

-12x - y = 33 . (-8)

{96x + 8y = - 264

{7x - 8y = 58

103x = - 206

x = - 206

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103

x = - 2

7x - 8y = 58

7 . (-2) - 8y = 58

- 14 - 8y = 58

- 8y = 58 + 14

- 8y = 72 . (-1)

8y = - 72

y = - 72

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8

y = - 9

S = {-2 , -9}