Is x= 3 a solution to the equation 2(2x +1) + x = 8x +2-3x

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Find the smallest number by which the given number should be divided to make a perfect cube(with steps or the answer will get reported) a.108 b.2187

Write the equations in logarithmic form 9^4=6,561