Tucker joined the new gym in town. When he signed up, he had to pay a $54.30 registration fee and the first month's membership. Tucker paid a total of $72.30 when he signed up. Let m represent the cost of the first month's membership. Which equation models the problem?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.