Предмет: Математика, автор: coolkorobleva

я дал одному ученику 3 ореха,а всем остальным по 5. Если бы я дал по 4 ореха,у меня осталось бы 15. Сколько было орехов? помагите пожалуйста решить без x


Areteas: Без "x" трудно,точнее он тут необходим.В общем,ответ 83.
yulyasha281286: ты чего

Ответы

Автор ответа: Areteas
5
Без "х",так без"х".
3+(t-1)•5=n
4t+15=n 
3+5t-5=4t+15
t=17
n=4t+15=68+15=83.
Автор ответа: yulyasha281286
2
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Areteas: Главное-не сдаваться!
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Предмет: Английский язык, автор: Greedy354
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1. Underline the correct form.
a. While he took / was taking a bath, Archimedes discovered / was discovering the
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b. When Edouard Benedictus, a French scientist, worked / was working in his
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d. AIexander FIeming discovered / was discovering penicillin by accident while he
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e. While Hiram Bingham climbed / was climbing in the mountains of Peru in 1911, he
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f .While Isaac Newton sat / was sitting under an apple tree, an apple fell / was falling
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28
g. While Dr Harry Coover tried / was trying to invent a new kind of pIastic, he made
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h. While he observed / was observing the Moon through his teIescope, Galileo
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2. Use the prompts to make a question. The answers are in Exercise 1.
a. Where / Edouard Benedictus / work when he invented safety glass?
Where was Edouard Benedictus working when he invented safety glass?
b. Where / Columbus / try to go when he reached America? _______________ ?
c. Where / Isaac Newton / sit according to the story about gravity?__________ ?
d. What / Dr Harry Coover I'hope to invent? ___________________________ ?
e. What Galileo / look at / through his telescope? _______________________ ?