Question

Раскройте скобки и упростить
А( a-(b+(5+2c))
Б) 1-(7-(2a-5))
В) 11-(2y+2(x-2))

Answer 1

1)a-(a-(2a-4))=a-(a-2a+4)=a-a+2a-4=2a-4
2)7x-((y-x)+3y)=7x-(y-x+3y)=7x-y+x-3y=8x-4y
3)4y-(3y-(2y-(y+1)))=4y-(3y-(2y-y-1)=4y-(3y-2y+y+1)=4y-3y+2y-y-4y=2y-1
4)5c-(2c-(b-c)-2b))=5c-(2c-b+c-2b)=5c-2c+b-c+2b=2c+3b


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