If 5x + 7y = 17 and y = x - 1, what value of x and y satisfy both equations?

a. (5/6, -1/6)
b. (2, 1)
c. (5, 4)
d. (12, 11)

1 answer

since y=x-2, use that to solve
5x + 7(x-1) = 17