Ответ:
70кг------100%
xкг--------20%. X=20x70
-----100-----------=14кг
14кг---------100%
Хкг----------20%. Х=20x14/100=280/100=2.8кг
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Ответ:
70кг------100%
xкг--------20%. X=20x70
-----100-----------=14кг
14кг---------100%
Хкг----------20%. Х=20x14/100=280/100=2.8кг