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maxni70
@maxni70
July 2022
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Помогите, плиз, решить уравнение для 5 класса
(21 + 75 : (2х + 13)) х 5 = 120
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krugly1981
5( 21 + 75÷ ( 2x + 13)) = 120
5( (42x +273 + 75) / ( 2x + 13) ) = 120
5( (42x + 348) / (2x + 13)) = 120
(210x + 1740) / (2x + 13) = 120
120( 2x + 13) = 210x + 1740
240x + 1560 = 210x + 1740
240x - 210x = 1740 - 1560
30x = 180
x = 180 / 30
x = 6
Ответ: x = 6.
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Thanks 1
maxni70
Гениально!... Но, не совсем понятно как получилось 5( (42x +273 + 75) / ( 2x + 13) ) = 120
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Answers & Comments
5( (42x +273 + 75) / ( 2x + 13) ) = 120
5( (42x + 348) / (2x + 13)) = 120
(210x + 1740) / (2x + 13) = 120
120( 2x + 13) = 210x + 1740
240x + 1560 = 210x + 1740
240x - 210x = 1740 - 1560
30x = 180
x = 180 / 30
x = 6
Ответ: x = 6.