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Алиюшка30
@Алиюшка30
July 2021
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раскройте скобки и упростите:a) a-(a-(2a-4)) ; б) 7x-((y-x)+3y) ; в) 4y-(3y-(2y-(y+1))) ; г)5c-(2c-((b-c)-2b)) Помогите пожалуйста!Очень надо)
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Artem112
Verified answer
a-(a-(2a-4))=
a-a+(2a-4)=
2a-4
7x-((y-x)+3y)=
7x-(y-x)-3y=7x-y+x-3y=8
x-4y
4y-(3y-(2y-(y+1)))
=4y-3y+(2y-(y+1))=y+2y-(y+1)=3y-y-1=
2y-1
5c-(2c-((b-c)-2b))
=5c-2c+((b-c)-2b)=3c+(b-c)-2b=3c+b-c-2b=2c-b
27 votes
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Answers & Comments
Verified answer
a-(a-(2a-4))=a-a+(2a-4)=2a-47x-((y-x)+3y)=7x-(y-x)-3y=7x-y+x-3y=8x-4y
4y-(3y-(2y-(y+1)))=4y-3y+(2y-(y+1))=y+2y-(y+1)=3y-y-1=2y-1
5c-(2c-((b-c)-2b))=5c-2c+((b-c)-2b)=3c+(b-c)-2b=3c+b-c-2b=2c-b