x=-103

-7x – 8 = 713

-7x = 713 + 8

-7x = 721

-> x = -103

\(-7x-8=713\)

\(-7x=713+8\)

\(-7x=721\)

\(x=721:(-7)\)

\(x=-103\)

7x - 8 = 713

7x = 721

x =721 : 7= 103

7x-8=713 

7x=713+8

7x=721

x=721:7=13

7x - 8 = 713 

7x     = 713 + 8

x       =  721 : 7

x       = 103 

7x-8=713

   7x=713+8

   7x=721

     x=721/7

     x=103

-103

7x-8=713

7x=713+8

7x=721

x=721/7

x=103

7x - 8 = 713

7x      = 713 + 8

7x      = 721

  x      = 721 : 7

  x      =    103

7x - 8 = 713

7x      = 713 + 8

7x       = 721

  x        = 721 : 7

  x        = 103

\(7x-8=713\)

\(\Leftrightarrow7x=721\)

\(\Leftrightarrow x=103\)

7x - 8 = 713

7x      = 721

  x      = 103

7x - 8 = 713

7x      = 713 + 8

7x      = 721

  x      = 721/7

  x      =103

7x - 8 = 713

     7x = 713 + 8 = 721

7x-8=713

7x=713+8

7x=721

x=721:7

x=103

7x - 8 = 713

7x = 721

x = 103

7x - 8 = 713

7x = 713 + 8 =721

x = 721 : 7 = 103

7x = 713 + 8

7x = 721

  x = 721 : 7

  x = 103

k nha bn

7.x-8=713

7.x=713+8

7.x=721

x=721:7

x=103

vậy x=103

7x = 713 + 8 

7 x = 721 

x = 721 : 7 

x = 103