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LizaBalihina
@LizaBalihina
June 2022
2
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Помогите номер 517!!!!
Пожалуйста!!
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Dashabask2016
15*(а+2)=6*(2а+7)
15а+30=12а+42
15а-12а=42-30
3а=12
а=4
второй не знаю как решить ???
5 * (3с+2)=8 * (9-2с)
15с+10=72-16с
15с+16с=72-10
31с=62
с=2
10k + 2 * (7k - 2)=5 * (4k+3)+3k
10k + 14k - 4=20k+15+3k
10k+14k-20k-3k=15+4
1k=19
k=19
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Dashulya37
12b-7(b+4) =26-4b
12b-7b-28=26-4b
12b-7b+4b=26+28
9b=54
b=54:9
b=6
0 votes
Thanks 0
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Answers & Comments
15а+30=12а+42
15а-12а=42-30
3а=12
а=4
второй не знаю как решить ???
5 * (3с+2)=8 * (9-2с)
15с+10=72-16с
15с+16с=72-10
31с=62
с=2
10k + 2 * (7k - 2)=5 * (4k+3)+3k
10k + 14k - 4=20k+15+3k
10k+14k-20k-3k=15+4
1k=19
k=19
12b-7b-28=26-4b
12b-7b+4b=26+28
9b=54
b=54:9
b=6