3+ 2e^-x = 6
what is the value of x?

Solve for x i'll try to attach the files bc it's not letting me for some reason

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.

Nine more than four times a number is the same as one less than twice the number. find the number?