Ответ:
7•(2.3+0.8х)+ 1.9х
0.8х = 0.8 • х
7•(2.3+0.8•0.4)+1.9•0.4= 7•2.62+0.6=19.1
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Ответ:
7•(2.3+0.8х)+ 1.9х
0.8х = 0.8 • х
7•(2.3+0.8•0.4)+1.9•0.4= 7•2.62+0.6=19.1