What is the solution to x + 9 = 21?
O A. x = 30
B. x = 18
O c. x = 12
O D. x= 9

First we need to isolate x. To do this, we have to subtract 9

x = 12!

Step-by-step explanation:

x=12

Step-by-step explanation:

x+9-9=21-9

x=12

hope this helps !!

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)

its totaly b

your welcome btw