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25-[26-(5*j-9)]:5=24

Răspuns :

25-[26-(5*j-9)]:5=24

[26 - (5 * j - 9)] : 5 = 25 - 24 = 1

26 - (5 * j - 9) = 5 * 1 = 5

5 * j - 9 = 26 - 5 = 21

5 * j = 21 + 9 = 30

j = 30 : 5

j = 6