Parentheses in advanced Order of Operations: Complete the missing number

We begin by solving the innermost parentheses:

$94-73=21$

We obtain the following calculation:

$x\colon(-6)+\lbrack-2(21)\rbrack=-153$

Next we focus on the parentheses and multiply:

$-2\times21=-42$

We obtain the following calculation:

$x\colon(-6)+(-42)=-153$

Let's consider the multiplication between minus and plus:

$x\colon(-6)-42=-153$

We swap sections:

$x\colon(-6)=-153+42$

$x\colon(-6)=-111$

$\frac{x}{-6}=-111$

Lastly we multiply by minus 6:

$x=-111\times-6=666$

We solve the exercise in parentheses:

$23\times19+25\colon5+?\times3=82$

We place the multiplication and division exercises inside parentheses:

$(23\times19)+(25\colon5)+?\times3=82$

We solve the exercise in parentheses:

$437+5+?\times3=82$

We simplify:

$442+?\times3=82$

We swap sections:

$?\times3=82-442$

$?\times3=-360$

We divide by 3

$?=-120$