4,8+9/14x-0,5x-1/7x, и еще одно(1,1/7x-1/3)*21=2 , дочери задали в школе! в классе по тетрадям ничего подобного не решали они!
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02.10.2019 17:40
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1
х=2 2/3
Пошаговое объяснение:
4,8+9/14х-0,5х-1/7х=4,8+9/14х-1/2х-1/7х=4,8+9/14х-7/14х-2/14х= 4,8
(1 1/7x-1/3)*21=2
(8/7х-1/3)*21=2
8/7х*21-1/3*21=2
24х-7=2
24х=2+7
24х=9
х=24:9
х=24/9=8/3=2 2/3
х=2 2/3