Answer:
x = 7
Explanation:
Subtract 7.2 from both sides of 11.3x + 7.2 = 86.3, obtaining:
11.3x = 79.1
Then x = 79.1 / 11.3 = 7
The answer is x = 7.
Please, when you list possible answers, separate them from one another using commas, semicolons or new entry lines. Thank you.