Help I do not understand

To find the solution of the system of equations, you need to find the coordinates of where the two graphs intersect. In this case they intersect at two points which are (-1,0) and (4,-5).

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8