определите x в следующих пропорциях: 4,3/5,6=17,2/8x  ; 1/9x /5/2=5,7/3,9 ; 4x /5=3,6/4,5;  20,4/13,2= 5,1/3x ,   1,5/2=3x /8; 3 целых 1/3/5x =4/3
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