Iknow and believe that can me with this 7th grade math homework because it is late at night and i am exhausted

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

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)

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality