Question

Resolva o sistema 4x - 2y = 10 e 7x + 6y = 15

Answer 1

Explicação passo-a-passo:

Resolva o sistema

4x - 2y = 10 (3)

7x + 6y = 15

12x - 6y = 30

7x + 6y = 15(+)

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19x = 45

x = 45/19

4x - 2y = 10 (:2)

2x - y = 5

2.45/19 - y = 5

90/19 - 5 = y

(90-19.5)/19= 19y/19

(90-95)= 19y

-5= 19y

-5/19= y

y = -5/19