Respuesta :

jessica0111

Answer:

A x=5 y=-2

Step-by-step explanation:

y = x − 7 ; 3 x + 7 y = 1

y = x - 7

Substitute

x − 7 for y in 3 x + 7y = 1:

3x + 7y = 1

3x + 7(x-7) = 1

10x - 49 = 1

10x = 50

x = 5

Substitute:

y = 5 - 7

y = -2

01SM1LECHARGE

Answer:

A. 5, -2

Ap.e.x