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olgatikhomolov
@olgatikhomolov
July 2022
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решите 7х+2х = 900 5у-2у=660 с проверкой
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lena25073
7х+2х = 900
9х=900
х=900/9
х=100
Проверка. 7*100+2*100=900
5у-2у=660
3у=660
у=660/3
у=220
Проверка
5*220-2*220=1100-440=660
0 votes
Thanks 0
Fhre
1) 7x+2x=900 2)5y-2y=660
9x=900 3y=660
x=900/9 y=660/3
x=100 y=220
7·100+2·100=900 5·220-2·220=660
700+200=900 1100-440=660
900=900. 660=660.
0 votes
Thanks 0
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Answers & Comments
9х=900
х=900/9
х=100
Проверка. 7*100+2*100=900
5у-2у=660
3у=660
у=660/3
у=220
Проверка
5*220-2*220=1100-440=660
9x=900 3y=660
x=900/9 y=660/3
x=100 y=220
7·100+2·100=900 5·220-2·220=660
700+200=900 1100-440=660
900=900. 660=660.