Verified Answer :

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(39 - x) รท 8 = 4
Multiply by 8 on both sides
39 - x = 32
Subtract 39 from each side
- x = - 7
Divide by - 1 (when there is a negative variable)
x = 7

\((39-?) \ divided \ by \ 8 \ = \ 4 \\ \\ We \ know \ 32 \ divided \ by \ 8 \ = \ 4 \\ \\ 39-32=7 \\ \\ Answer:(39-32) \ divided \ by \ 8 \ = \ 4 \ or \ \boxed{?=7} \\\)