Use the substitution method to solve the system of equations.

3x+7y=1

y=x-7

A. 5,-2

B. 3,-4

C. 4,-3

D. 2,-5

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