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8:{[ (9×Y+42):Y]×4-52} =1

Răspuns :

8:{[ (9×Y+42):Y]×4-52} =1

[(9×Y+42):Y]×4-52 = 8

[(9×y+42) :y]×4 = 8+52 = 60

(9 ×y + 42) : y = 60 : 4

(9 ×y + 42) : y = 15

9 ×y + 42 = 15×y

15×y - 9×y = 42

6×y = 42

y = 42 : 6

y = 7