(4 X 6 ÷ 3) + 9 – 2

Let's show how we arrived at '15'  as the answer

(4 X 6 ÷ 3) + 9 – 2     work inside the parentheses, first

(24 / 3)  + 9 - 2  =     and once more

(8) + 9 - 2  =       now, we just carry out the additions and subtractions from left to right

17 - 2 =

15 

 so x is equal to 15