I think you have to combine like terms to solve this one. (6d - 3d) + (5 - 2) = 3d + 3
16 or B. Because 128 divided by 8 is 16
Answer: 6 years
Step-by-step explanation:
Formula to calculate compound amount:
, where P= Principal , r=rate of interest, t= time
Given: P = £400, r = 3% = 0.03 , A= 475
Required equation: 

Taking log on both sides , we get

Hence, he needs to invest the money for 6 years to get atleast £475.