Answer: x = 30.39
Step-by-step explanation:
Hey there! I will give the following steps, if you have any questions feel free to ask me in the comments below. Good luck!
<u>Step 1:</u><em> Simplify 21.39 + 9 to 30.39.</em>
Basically, add 21 + 9 which equals 30, then add .39 to the end. You will then get 30.39.
30.39 = x
<u>Step 2:</u> <em>Switch sides.</em>
x = 30.39
~I hope I helped you! :)~