Ineed to know if this is a false conjecture

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)