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36-42:e:(15:3-4:1)-20 = 1 0​

Răspuns :

Răspuns:

..36-42÷e÷(15÷3-4÷1)-20=10

36-42÷e÷(5-4)-20=10

36-42÷e÷1-20=10

36-42÷e-20=10

36-42÷e=10+20

36-42÷e=30

42÷e=36-30

42÷e=6

e=42÷6

e=7