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kaSyy
@kaSyy
July 2022
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решите уравнение 2x+7=21, 3x-7=20, 2*(2x+7)=2x+44
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nnnwww
1) 2x+7=21
2x=21-7
2x=14
x=7
2) 3x-7=20
3x=20+7
3x=27
x=9
3) 2•(2x+7)=2x+44
4x+14=2x+44
4x-2x=44-24
2x=30
x=15
1 votes
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kaSyy
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Answers & Comments
2x=21-7
2x=14
x=7
2) 3x-7=20
3x=20+7
3x=27
x=9
3) 2•(2x+7)=2x+44
4x+14=2x+44
4x-2x=44-24
2x=30
x=15