Question

{x+y=6
{x-y=4




{x+y=6
{2x+y=4​

Answer 1

Explicação passo-a-passo:

{x+y=6

{x-y=4

2x = 10

x = 10/2

x = 5

x + y = 6

5 + y = 6

y = 6 - 5

y = 1

{x+y=6 ( - 1)

{2x+y=4

{-x - y = - 6

{2x+y=4

x = - 2

{x+y=6

- 2 + y = 6

y = 6 + 2

y = 8