What is 2log8x equals log8 3 plus log8 27?

Answer 1

Get x on it's own by:

Dividing both sides by 2

Put both sides to the power 8

You now have: x = 8^((log8 3 + log8 27)/2))

Simplify the right side: log8 3 + log8 27 = log8 81

0.5 * log8 81 = log8 81^0.5 = log8 9

Thus x = 9