Question

2x+7y = 9
6x-8y=-2

ayudaaaa​

Answer 1

Respuesta:

x =  1

y = 1

Explicación paso a paso:

2x + 7y = 9

6x - 8y = -2

Despejar x en 2x + 7y = 9:

2x + 7y = 9

2x = 9 - 7y

x = 9/2 - 7y/2

Remplazar x en 6x - 8y = -2:

6(9/2 - 7y/2) - 8y = -2

27 - 21y - 8y = -2

-21y - 8y = -2 - 27

-29y = -2 - 27

-29y = -29

y = -29/-29

y = 1

Remplazar y en 2x + 7y = 9:

2x + 7y = 9

2x + 7(1) = 9

2x + 7 = 9

2x = 9 - 7

2x = 2

x = 2/2

x = 1