Answer:
0 = -$2 million + $160,000 ÷ i - $100,000(A/F,i,5) ÷ i
Step-by-step explanation:
The equation is shown below:
But before that first determine the following things 
Incremental investment is 
= $5000,000 - $7,000,000 - $200,000 - $40,000 - $100,000(P/F,I,N) 
 Now solve it 
 = -2 million + $160,000 - 100000(P/F,I,n) 
 As it is a perpetuity so 
Present value = Periodic payment ÷ rate of interest 
 So, 
0 = -$2 million + $160,000 ÷ i - $100,000(A/F,i,5) ÷ i