Ответ:
(x×8)-400+40=200
(x×8)=200+440
x×8=640
x=640÷8
x=80
80×8-440=200
80=80
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Ответ:
(x×8)-400+40=200
(x×8)=200+440
x×8=640
x=640÷8
x=80
80×8-440=200
80=80