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olgarudnickaya
@olgarudnickaya
July 2022
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решить уравнения за 4 класс:
1. (72-х):6+25=34
2. 28:(20*у-76)=7
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uh19
Verified answer
(72-х):6+25=34
(72-х):6=34-25
(72-х):6=9
72-х=9 * 6
72-х=54
х=72-54
х=18
проверка:
(72-18):6+25=54:6+25=9+25= 34 верно
2.
28:(20*у-76)=7
20*у-76=28:7
20*у-76=4
20*у=4+76
20*у=80
у=80:20
у=4
проверка
28:(20*4-76)=28:(80-76)=28:4=7 верно
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Answers & Comments
Verified answer
(72-х):6+25=34(72-х):6=34-25
(72-х):6=9
72-х=9 * 6
72-х=54
х=72-54
х=18
проверка:
(72-18):6+25=54:6+25=9+25= 34 верно
2. 28:(20*у-76)=7
20*у-76=28:7
20*у-76=4
20*у=4+76
20*у=80
у=80:20
у=4
проверка
28:(20*4-76)=28:(80-76)=28:4=7 верно