A conjecture and a portion of the flowchart proof used to prove the conjecture are shown.Which equation best represents the information that should be in the box labeled 1?3x = 93x = 263x = 273x = 30

3x - 1 = 26

addition property of equality, means add 1 to both sides
so 3x = 27

answer
3x = 27 (C. third choice)