Question

Por el método de sustitución

1) y + 2x = 8
2) 2y + 4 =6x​

Answer 1

y + 2x = 8

2y + 4 = 6x

y = 8 - 2x

2y + 4 = 6x

2 (8 - 2x) + 4 = 6x

16 - 4x + 4 = 6x

20 - 4x = 6x

- 4x - 6x = - 20

- 10x = - 20

10x = 20

x = 20 / 10

(x = 2)

REEMPLAZAMOS X, PARA HALLAR EL VALOR DE Y:

y + 2 (2) = 8

y + 4 = 8

y = 8 - 4

(y = 4)

COMPROBAMOS (X= 2 , Y= 4)

4 + 2(2) = 8

4 + 4 = 8

8 = 8

2 (4) + 4 = 6 (2)

8 + 4 = 12

12 = 12