Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
The main difference between an equation and a function is the fact that an equation usually deals with a single input, whereas, a function can have numerous inputs. In mathematics, an equation is used to denote the equality between two expressions.
Answer. An equation is the combination of two expressions that are separated by an equals sign. So this means that both expressions must equal each other. This makes the problem relatively simple to solve, because you can solve the side that is easiest first and then solve the other side. Let's take a look at an equation and solve it: x - 4 = 5.