Question

Responda a equacao do primeiro grau4x+2y=10. X-y=2

Answer 1

Resposta:

{4x + 2y = 10

{x - y = 2

4x = 10 - 2y

x = 10/4 - 2/4y

10/4 - 2/4y = 2

-2/4y = 2 - 10/4

-2/4y = -2/4

y = -2/4/-2/4

y = -2/4 . 4/-2

y = -8/-8

y = 1

4x + 2y = 10

4x + 2.1 = 10

4x + 2 = 10

4x = 10 - 2

4x = 8

x = 8/4

x = 2