If x represents the total number of bags a person checks and each person checks more than two bags, the equation below can be used to determine C, the total fee for all the bags.

20 + 25 + 50(x - 2) = C

Arianna paid a total of $145 to check all her bags on a flight. How many bags did she check in all?

20+25+50x-100=145

solve for x

20 + 25 + 50(x - 2) = C

Arianna paid a total of $145 to check all her bags on a flight. How many bags did she check in all?

To find the number of bags Arianna checked in all, we need to solve the equation:

20 + 25 + 50(x - 2) = 145

First, let's simplify the equation:

45 + 50(x - 2) = 145

Next, let's distribute the 50 to the terms inside the parentheses:

45 + 50x - 100 = 145

Now, let's combine like terms:

50x - 55 = 145

To isolate the variable, let's add 55 to both sides:

50x = 200

Finally, let's divide both sides by 50 to solve for x:

x = 4

Therefore, Arianna checked a total of 4 bags.