Автор - наизик

(5х+2х)*14=294
(12у-5у):4=21
(19х+6х):35=5
234:(21y-8y)=3

Ответ

Автор - даряс
(5х+2х)*14=2947х=294/14
7х=21
х=21/7
х=3
(12у-5у):4=21
7у=21*4
7у=84
у=84/7
у=12
(19х+6х):35=5
25х=5*35
25х=175
х=175/25
х=7
234:(21y-8y)=3

13у=234/3
13у=78
у=78/13
у=6

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