Photos 2.8 0.5

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2.8 0.5. 1 1/35 / 4/5 - 1,8 Х 3 1/3. Х/2-X-3/4-X+1/8<1/2. 5 5 3 :4 3 2 =X:2 15 1. Х/5+Х/15 = 1/3.
1 1/35 / 4/5 - 1,8 Х 3 1/3. Х/2-X-3/4-X+1/8<1/2. 5 5 3 :4 3 2 =X:2 15 1. Х/5+Х/15 = 1/3.