5 2/9 x=1
8 1/2:x+5 1/4=7 2/3
(X-1/7)×4 2/3=1 2/7
(X+2 1/7):4 2/3=1 2/7
(2 1/2-5 1/2):5 2/9=2 1/4
(5 2/7-1/7+2 1/3)×2/7=5 1/7
Даю 50 балов
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