How many solutions are In 2(x+8)=2x+16

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?

The graph of a curve that passes the vertical line test is a:

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)