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rezolvati ecuatia :
{[(7-3)*5-2+3]:7+9}:x=4


Răspuns :

{[(7-3)×5-2+3]:7+9}:X=4
[(4×5-2+3):7+9]:x=4
(21:7+9):x=4
(3+9):x=4
12:x=4
x=12:4
x=3