ПОМОГИТЕ ПЖ!!
Реши уравнения, пользуясь " перекрестным правилом":
1) х:6,3=1/9:2,8; 2) 1 1/3:2 5/6=2/17:0,25х; 3) 6,125:4х=0,35:2/7; 4) 2 1/4:1,6=0,125х:2 2/3
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