Let's look at the first two, and hopefully you'll be able to figure the rest out:
1. Answer below
The problem asks us to solve for , so that means we need to get on one side of the equation by itself. To do so, we will need to divide both sides of the equation by :
2. Answer below
The problem asks us to solve for , so that means we need to get on one side of the equation by itself. To do so, we will need to add to both sides of equation: