Помогите плиз!!!!!!!!!!!!!!!!!

Question

Помогите плиз!!!!!!!!!!!!!!!!!

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Answer 1

9 5\13-(7 6/13-y ) =2 3/13
7 6/13 -y = 9 5\13-2 3/13
7 6/13 -y = 7 2/13
y = 7 6/13 - 7 2/13
y = 4/13
Ответ : y = 4/13