Final answer:The original number of people on the boat was 78. This was found by setting up and solving an equation based on the changes in the number of people on the boat.Explanation:In this problem, we are trying to find out how manypeoplewere originally on theboatbefore it docked at the firstharbor.First, let's recap the changes in people on the boat: 26 people got off at the first harbor, and then 22 people got on. Now, there are 74 people on the boat. We can set up anequationusing these numbers to find the original amount of people on the boat.Let's call the original number of people 'x'. The changes mentioned above give us the following equation: x - 26 + 22 = 74.To find 'x', we first combine like terms, which gives us x - 4 = 74. Then, adding 4 to both sides of the equation gives us x = 78.So, there were originally 78 people on the boat before it docked at the first harbor.Learn more about Subtraction and Addition here:brainly.com/question/35707486#SPJ11...

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