The answer is positive 5. Any negatives the opposite of them would be a positive number.....
In this equation, x = 7.
In order to solve this you are going to need to use logarithmic functions. By taking a logarithm you can eliminate exponents.

First we're going to take the logarithm of both sides, which allows us to put the exponents in front of the terms.
(x + 2)Log5 = 9Log5
Now that we've done this, we can divide both sides by Log5 and eliminate that term.
x + 2 = 9
From here, we simply need to subtract in order to solve.
x = 7
Hey!!
here is your answer >>>
6X = 72
If we divide 6 on both sides, we get,
6X÷6 = 72÷6
X = 12
This is also the multiplication property of equality
Hope my answer helps!
you need to provide more information :/