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(n - 3/8) * 8/35 + 2 2/7 = 2 2/5
ответ: n = ?/?.​

(n - 3/8) * 8/35 + 2 2/7 = 2 2/5

(n - 3/8) * 8/35 = 2 2/5 - 2 2/7

(n - 3/8) * 8/35 = 2 14/35 - 2 10/35

(n - 3/8) * 8/35 = 2 4/35

n - 3/8 = 2 4/35 : 8/35

n - 3/8 = 74/35 * 35/8

n - 3/8 = 37/4

n - 3/8 = 9 1/4

n = 9 1/4 + 3/8

n = 9 2/8 + 3/8

n = 9 5/8

n = 77/8