Решите уравнения: 1) 4 : x = 14:49
2) 42:14 = 72:x
3) X:13=1,2:0,2;
4) 0,1:002=y: 0,8
5) 4,5: y = 27:21
6) 2 целые 1/3 = 12:18
математика, помогите!!​
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