Question

Помогите пожалуйста срочно все подробно

Answer 1

Ответ:

Пошаговое объяснение:

2 5/12 - 4 3/4 = 2 5/12 - 4 9/12 = -(4 9/12 - 2 5/12) = -2 4/12 = -2 1/3

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a + 7 2/15 = 5 4/25

a = 5 4/25 - 7 2/15

a = 5 12/75 - 7 10/75

a = -(7 10/75 - 5 12/75)

a = -(6 85/75 - 5 12/75)

a = -1 73/75

Answer 2

2 5/12- 4 3/4 = 29/12- 19/4 = - 7/3

a + 7 2/15 = 5 4/25

a + 107/15 = 129/25

а=129/25 - 107/15

а= - 148/75