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myauMrr
@myauMrr
October 2021
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Раскройте скобки и упростите выражение
а)-(7-x)+(3x-14)
б) -(x+4)-(2x-8)
в) (21-a)-(20-2a)
г) -(13+b)+(-b-13)
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Answers & Comments
jekadva
а)-(7-x)+(3x-14)=-7+x+3x-14=4x-21
б) -(x+4)-(2x-8)=-x-4-2x+8=4-3x
в) (21-a)-(20-2a)=21-a-20+2a=a+1
г) -(13+b)+(-b-13) =-13-b-b-13=-2b-26
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Answers & Comments
б) -(x+4)-(2x-8)=-x-4-2x+8=4-3x
в) (21-a)-(20-2a)=21-a-20+2a=a+1
г) -(13+b)+(-b-13) =-13-b-b-13=-2b-26