Which function is not the same as the the other three?

Solve |2x - 5| = 4 if anyone could , that would be great

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Is the figure congruent? yes or no?