How do you solve #3^(x+1) + 3^x = 36#?
First we to need to know a property of exponents with more than 1 term:
Applying this, you can see that:
As you can see, we can factor out
And now we rearrange so any term with x is on one side:
It's should be easy to see what
In logarithms, there is a root which states:
And if you type it into your calculator you'll get