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42-90:{[(36:x-4)x5-7]:2}=320

Răspuns :

-90:{[(36:x-4) x 5-7]:2}=320-42
[(36:x-4) x 5-7]:2=278+90
(36:x-4) x 5-7=368 x 2
(36:x-4) x 5=736+7
36:x-4=743/5
36:x=743/5+4
36:x=(743+20)/5
x=763/5 x 36
x=27468/5
coronita?