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missshvenko
@missshvenko
July 2022
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Математика! Заранее СПАСИБО!!!
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artkolp
Verified answer
1.
/6х-2х-2-х+2 < 12
\4x≥-12
/3x<12
\4x
≥12
/x<4
\x
≥3
Ответ: х
∈ [3;4)
2.
/0,4*(x+y) = 0,6*(x-y)
\2x+y = 55
/4x+4y = 6x-6y
\y = 55-2x
/x = 5y
\y = 55-10y
/x = 25
\y = 5
x+y = 25+5 = 30
Ответ: 30
P.S. Остальное уж сами, а то и так много заданий.
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Answers & Comments
Verified answer
1./6х-2х-2-х+2 < 12
\4x≥-12
/3x<12
\4x≥12
/x<4
\x≥3
Ответ: х ∈ [3;4)
2.
/0,4*(x+y) = 0,6*(x-y)
\2x+y = 55
/4x+4y = 6x-6y
\y = 55-2x
/x = 5y
\y = 55-10y
/x = 25
\y = 5
x+y = 25+5 = 30
Ответ: 30
P.S. Остальное уж сами, а то и так много заданий.