Номер 3 срочно помогите.

Question

Номер 3 срочно помогите.

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Answer 1

(х - 3/8) * 8/35 + 2 2/7 = 2 2/5
(х - 3/8) * 8/35 = 2 2/5 - 2 2/7
(х - 3/8) * 8/35 = 12/5 - 16/7
(х - 3/8) * 8/35 = 84/35 - 80/35
(х - 3/8) * 8/35 = 4/35
х - 3/8 = 4/35 : 8/35
х - 3/8 = 4/35 * 35/8
х - 3/8 = 1/2
х = 1/2 + 3/8
х = 4/8 + 3/8
х = 7/8