Найдите неизвестный член пропорции
а)3,75 : 1целая1/8=2целых1/3 : х
б)1,2 : х = 3 : 7
в)1,5 : 0,3 = 9 : 3
г)1    /   90
-----=-------
0,5  /     х
д)х:7/18=2/7:7/9



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