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Автор - Lololol82

0,4•(х-9)-0,3•(х+2)=0,7 Найдите Х.
Помогите пожалуйста

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Проверено экспертом

Автор - Gor4itza
0,4(х-9)-0,3(х+2)=0,7
0,4х-3,6-0,3х-0,6=0,7
0,4х-0,3х=0,7+3,6+0,6
0,1х=4,9
х=4,9:0,1
х=49

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