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sashasfina2001
@sashasfina2001
July 2022
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1)-(-x-9)+5x-4,5
2)(x+8)-(x+a-5)+2
3-(15+x-3)+3(x-5)
4)-(15x-10)-(2,5+6x)
5)(a+b-c)-(2a-b-c)+a
6)-(x-5+3a)+(2+3a-1,5x)
7)2*(3x-11)-5*(4-3x)
8)0,2(6x-5)-4*(0,2x-2)
9)-8*(2+2x)+4*(3-4x)
10)фотография
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jekadva
=========
1)-(-x-9)+5x-4,5=x+9+5x-4,5=6x+4,5
2)(x+8)-(x+a-5)+2=x+8-x-a+5+2=15-a
3)-(15+x-3)+3(x-5)=-15-x+3+3x-15=2x-27
4)-(15x-10)-(2,5+6x)=-15x+10-2,5-6x=7,5-21x
5)(a+b-c)-(2a-b-c)+a=a+b-c-2a+b+c+a=2b
6)-(x-5+3a)+(2+3a-1,5x)=-x+5-3a+2+3a-1,5x=7-2,5x
7)2*(3x-11)-5*(4-3x)=6x-22-20+15x=21x-42
8)0,2(6x-5)-4*(0,2x-2)=1,2x-1-0,8x+8=0,4x+7
9)-8*(2+2x)+4*(3-4x)
=-16-16x+12-16x=-32x-4
=========
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Answers & Comments
=========
1)-(-x-9)+5x-4,5=x+9+5x-4,5=6x+4,5
2)(x+8)-(x+a-5)+2=x+8-x-a+5+2=15-a
3)-(15+x-3)+3(x-5)=-15-x+3+3x-15=2x-27
4)-(15x-10)-(2,5+6x)=-15x+10-2,5-6x=7,5-21x
5)(a+b-c)-(2a-b-c)+a=a+b-c-2a+b+c+a=2b
6)-(x-5+3a)+(2+3a-1,5x)=-x+5-3a+2+3a-1,5x=7-2,5x
7)2*(3x-11)-5*(4-3x)=6x-22-20+15x=21x-42
8)0,2(6x-5)-4*(0,2x-2)=1,2x-1-0,8x+8=0,4x+7
9)-8*(2+2x)+4*(3-4x)=-16-16x+12-16x=-32x-4
=========