задание 4. 1/7х = 1. 2) 9х = 1 . 3) 1/5.8 х = 1 . 4) 1/2х = 1 . 5) 5х = 1 . 6) 1/10 х = 1 . 7) 3/2.5 х = 1. 8) 100х = 1 ?

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