PLEASE HELP MEE!!! I NEED THE ANSWER AND HOW YOU GOT THE ANSWER!!!!

Answer:
x = 3.7
Step-by-step explanation:
10.5 + 2.8 + 9 + x = 26
22.3 + x = 26
-22.3 -22.3
x =3.7
Answer
3.7
Step-by-step explanation:
10.5 + 9= 19.5 + 2.8 = 22.3
then subtract 26 by 22.3