1. Why are equations so important in mathematics?
Most problems in mathematics can be broken down into an equation. Solving this equation will then help you solve the problem.
2. How many solutions do linear equations usually have?
Linear equations usually have ONE solution. Quadratic equations, which have a "squared" term in them usually have TWO solutions.
3. What is the best way to deal with an equation with fractions?
There are several ways, but a good general method that works for most equations is to multiply each term in the equation by the common denominator. (This will eliminate all of the fractions.)