The answer is x=9
Explanation:
First simplify it. Since when you multiply exponents you can add them, thats how you simply
2/3^x+2/3^9=2/3^18
Ok now that we simplified as much as we can, we can remove the base since they all have the same base. (The base is 2/3) so the equation is now:
x+9=18
Now just solve for x
x+9=18 subtract 9 from both sides
x=9
Brainliest my answer if it helps you out?