When the supply curve and demand curve are again overlapped on each other, they again reveal either a disequilibrium or equilibrium. However, in this case in fig. 7 on the left reveals a shortage disequilibrium. For example;

At P = 10,
Quantity demanded = 70 while
Quantity supplied = 10

A shortage of 60 results (or 10-70)

With a shortage, consumers outbid each other pushing prices up towards equilibrium.