Final answer:
When the graphs of linear equations in a system are parallel, there is no solution to the system.
Step-by-step explanation:
When the graphs of linear equations in a system are parallel, it means there is no solution to the system. This is because parallel lines have the same slope but different y-intercepts, so they will never intersect.
For example, if we have the equations y = 3x + 2 and y = 3x + 5, the lines will be parallel and will never intersect. Therefore, there is no solution to this system.
In conclusion, when the graphs of linear equations in a system are parallel, there is no solution to the system.