Пошаговое объяснение:
d - 5/9d = 1,4
4/9d = 1,4
d = 1,4 : 4/9
d = 14/10 * 9/4
d = 7/10 * 9/2
d = 63/20
d = 3 3/20
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Пошаговое объяснение:
d - 5/9d = 1,4
4/9d = 1,4
d = 1,4 : 4/9
d = 14/10 * 9/4
d = 7/10 * 9/2
d = 63/20
d = 3 3/20