Предмет: Алгебра, автор: a1914440305

Помогите решить алгебру срочно надо!!!!!!!!

Приложения:

helpmeiwanttodie: вариант?

a1914440305: Оба, спасибо

helpmeiwanttodie: могу только 2 задание, делать?

a1914440305: Да

helpmeiwanttodie: ок сейчас

Ответы

Автор ответа: helpmeiwanttodie

1 вариант

2x+y=11

3x-y=9

y=11-2x

3x-(11-2x)=9

3x-11+2x=9

5x=20

x=4

у=11-2*4

y=3

2 вариант

5x- 2у ( там 2 или 9 написано?) = 6

7х+2у = 6

2у=6-7х

5х - (6-7х)=6

5х-6-7х=6

-12х=12

х=-1

2у=6-7(-1)

2у = 13

у= 6.5

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industrial and everyday pllrposes. They l1clp to do jobs better or more
rationally than before and take over jobs that coLJidn't Ье done otherwise.
So, industrial electronics LJndouЬtedly plays а vcry important role today.
You can easily find many electronic eqllipments at lюme: а tape recorder,
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The application and use of electronic eqllipments dcmands а good
knowledge of their fundamentals.
In meters and lamps electricity flows in the wire. Bllt inside any
transistor or microcblp (and previously, in radio tubes) electric current
passes through the space (or semiconductor) separating certain parts in
tbls detail. Such action is called electronic. lt's not difficult to imagine it
because the same happens in lightning. There you actually see how
electricity jumps through space.
The first electronic equipments used radio lamps. They were: а radio
set, а ТV set, computing machines (predecessors of modem calculators),
computers (wblch occupied Ьig rooms), tape recorders.
The next stage came when transistors were invented. The devices
became more powerful and much smaller. The number of devices increased
greatly, some multifunctional devices appeared (radio + tape recorder).
Computers and calculators became smaller: cassette recorders and videocassette
recorders appeared.
The next period was the period of microcblps. They helped to reduce
big parts of devices, computers and other devices.
Тhе latest period of industrial electronics development is the period of
total digitization of all electronic devices, making them compatiЬle with the
computer. Photos are no longer made on film but on memory cards, cassettes
and video cassettes are out of use. Television is also becoming digital.
Industrial electronics is а great part of our leisure time, it makes
people's lives easier, and reduces their working time.

1. For what purposes are electronic equipments used now? What do
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