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cherepanov2005
@cherepanov2005
July 2022
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помогите решить уравнение 1) 420-х*6=300 2) с*9-180=540
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anastasija1981
1. 420-6x=300
-6x=300-420
6x=120
x=20
2. 9c-180=540
9c=540+180
9c=720
c=720/9
c=80
1 votes
Thanks 2
wiktoria12
1) 420-х*6=300
-х*6=300-420
-х*6=-120
х=-120/-6
х=20
проверка 420-20*6=300
2) с*9-180=540
с*9=540+180
с*9=720
с=720/9
с=80
проверка 80*9-180=540
2 votes
Thanks 9
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Answers & Comments
-6x=300-420
6x=120
x=20
2. 9c-180=540
9c=540+180
9c=720
c=720/9
c=80
-х*6=300-420
-х*6=-120
х=-120/-6
х=20
проверка 420-20*6=300
2) с*9-180=540
с*9=540+180
с*9=720
с=720/9
с=80
проверка 80*9-180=540