Question

TÌM X 

a) 11 -  ( 15 + x ) = x - ( 25 - 9x )
 

Answer 1

11-15-x=x-25+9x

-x-x-9x=-25+15-11

-11x=-21

x=21/11

Answer 2

x=1909090909

Answer 3

11-15-x=x-25+9x

-x-x-9x=-25+15-11

-11x=-21

x=21/11

Answer 4

21/11 on luon

Answer 5

bằng 2/11

Answer 6

  Ta có : 11-15-x=x-25+9x

       -4-x=10x-25

      -4-x-10x+25=0

   21-11x=0

  11x=21

 x=21/11

Answer 7

<=>11-(15+x)=-(x+4)

=>x-(25-9x)=5(2x-5)

=>-(x+4)=5(2x-5)

=>-x-4=10x-25

=>-11x=-21

=>x=\(\frac{21}{11}=1\frac{10}{11}\) hoặc 1,(90)

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