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danilmalikov2003
@danilmalikov2003
August 2022
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natalia0nickname
А) 5(2а+1)-3а=10а+5-3а=7а+5
б) 5а+7b-2a-8ab=3a-8ab+7b
в) 3(4x+2)-5x=12x+6-5x=7x+6
г) 20b-(b-3)+(3b-10)=20b-b+3+3b-10=18b-7
д) 5x+3y-2x-9y=3x-6y=3(x-2y)
е) 2(3a-4)+5=6a-8+5=6a-3=3(2a-1)
ё) 15a-(a-3)+(2a-1)=15a-a+3+2a-1=14a+2=2(7a+1)
ж) 12a-10b-10a+6b=2a-4b=2(a-2b)
з) 4(3x-2)+7=12x-8+7=12x-1
и) 8x-(2x+5)+(x-1)=8x-2x-5+x-1=7x-6
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Answers & Comments
б) 5а+7b-2a-8ab=3a-8ab+7b
в) 3(4x+2)-5x=12x+6-5x=7x+6
г) 20b-(b-3)+(3b-10)=20b-b+3+3b-10=18b-7
д) 5x+3y-2x-9y=3x-6y=3(x-2y)
е) 2(3a-4)+5=6a-8+5=6a-3=3(2a-1)
ё) 15a-(a-3)+(2a-1)=15a-a+3+2a-1=14a+2=2(7a+1)
ж) 12a-10b-10a+6b=2a-4b=2(a-2b)
з) 4(3x-2)+7=12x-8+7=12x-1
и) 8x-(2x+5)+(x-1)=8x-2x-5+x-1=7x-6