Question

qual a resposta do calculo 5x+2y=2 6x+y=8

Answer 1

5x + 2y = 2

6x + y = 8      *( -2 )

5x + 2y = 2

-12x - 2y = - 16

- 7x = - 14   * (-1)

7x = 14

x = 14/7

x = 2

5x + 2y = 2

5*(2) + 2y = 2

10 + 2y = 2

2y = 2 - 10

2y = - 8

y = - 8/2

y = - 4

(2, -4)