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{111-[408:(x-5)+260]:3}×9+32=239
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Răspuns :

{111-[408/(x-5)+260]/3}*9+32=239
{111-[408/(x-5)+260]:3}×9=239-32
{111-[408/(x-5)+260]:3}×9=207
111-[408/(x-5)+260]:3=207/9
111-[408/(x-5)+260]/3=23
[408/(x-5)+260]/3=111-23
[408/(x-5)+260]/3=88
408/(x-5)+260=88x3
408/(x-5)+260=264
408:(x-5)=264-260
408:(x-5)=4
x-5=408:4
x-5=102
x=102+5
x=107