In order for a linear equation to have a solution, they need to intersect at a point in a coordinate graph. This solution is that point in which they intersect. A y = *insert random number here* equation goes horizontally for an infinite amount of time. No matter how long you go on a number graph, a "y = number" equation goes on infinitely in the same direction, which is horizontal. Two of these in different spots make a linear equation that has no solution.
