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Пошаговое объяснение:
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пусть первая машина -Х тонн
Вторая машина Х+0,56 тонн
Х+Х+0,56=11,2
2Х+0,56=11,2
2Х=11,2-0,56
2Х=10,64
Х=10,64/2
Х=5,32-первая машина
5,32+0,56=5,88 тонн вторая машина
5,32+5,88=11,2тонны-на двух машинах