Answer: x = 5
Explanation:
start by dividing 7 from both sides
take the log of both sides
move the x to the left of the log
divide both sides by log(2)
use change-of-base formula
since , x = 5
Answer:
5
Original equation:
Divide both sides by 7
Rewrite in log
You can do mental math to realize this equals 5, or plug this into your calculate (if it allows you to set the base), but if you can't do either, you can use the change of base formula:
You get:
When you calculate using a calculator you should get 5
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