{[3x(3+6)-5]+20}x2

To solve the given expression {[3x(3+6)-5]+20}x2, we can follow the order of operations (PEMDAS/BODMAS).

First, we simplify the expression within the innermost parentheses:
3 + 6 = 9

Now, we simplify the multiplication within the parentheses:
3x9 = 27

Next, we substitute the simplified expression back into the original expression:
[27-5]+20 = 22+20 = 42

Finally, we multiply the result by 2:
42 x 2 = 84

So, the simplified expression is 84.