Solve for x: 5a + 7x = 3(2a + 1) +4x

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5