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koteiko013
@koteiko013
December 2021
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Помогите пожалуйста >///<
Представьте в виде суммы:
а) 2(а+в)
б) 8(3а-2в)
в) (х-2)*7
г) (5а - 7в)*3/35
д) 2.5(е-f)
е) 9(10х-5у+1)
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Answers & Comments
Хуqожнuк
2(a + b) = 2a + 2b
8(3a - 2b) = 24a - 16b = 24a + (-16b)
(x - 2)*7 = 7x - 14 = 7x + (-14)
(5a - 7b)*3/35 = 15a/35 - 21/35 = 3a/7 - 3/5 = 3a/7 + (-3/5)
2.5(e - f) = 2.5e - 2.5f = 2.5e + (-2.5f)
9(10x - 5y + 1) = 90x - 45y + 9 = 90x + (-45y) + 9
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koteiko013
Thank you very much!
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Answers & Comments
8(3a - 2b) = 24a - 16b = 24a + (-16b)
(x - 2)*7 = 7x - 14 = 7x + (-14)
(5a - 7b)*3/35 = 15a/35 - 21/35 = 3a/7 - 3/5 = 3a/7 + (-3/5)
2.5(e - f) = 2.5e - 2.5f = 2.5e + (-2.5f)
9(10x - 5y + 1) = 90x - 45y + 9 = 90x + (-45y) + 9