Пошаговое объяснение:
(х+7 1/20)-5 3/40=7/40
(Х+141/20)-203/40=7/40
Х+141/20=7/40+203/40
Х+141/20=210/40
Х=210/40-141/20
Х=(210-282)/40
Х= - 72/40= - 9/5= - 1,8
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Пошаговое объяснение:
(х+7 1/20)-5 3/40=7/40
(Х+141/20)-203/40=7/40
Х+141/20=7/40+203/40
Х+141/20=210/40
Х=210/40-141/20
Х=(210-282)/40
Х= - 72/40= - 9/5= - 1,8
x= -1,8