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angelikaf2007
@angelikaf2007
August 2022
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Помогите решить уравнение 7*(3+r)=33+5r решить с проверкой и доказательством дам 80 баллов
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Synco
7*(3+r)=33+5r
21+7r=33+5r
7r-5r=33-21
2r=12
r=12:2
r=6
Проверка:
7*(3+6)=33+5*6
21+42=33+30
63=63 (верно)
3 votes
Thanks 2
Melonpan
7*(3+r)=33+5r
21+7r=33+5r
7r-5r=33-21
2r=12
r=12
÷2
r=6
7*(3+6)=33+5*6
63=63
1 votes
Thanks 1
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Answers & Comments
21+7r=33+5r
7r-5r=33-21
2r=12
r=12:2
r=6
Проверка:
7*(3+6)=33+5*6
21+42=33+30
63=63 (верно)
21+7r=33+5r
7r-5r=33-21
2r=12
r=12÷2
r=6
7*(3+6)=33+5*6
63=63