Respuesta :

7x-2=-23  add 2 to both sides to get 7x by itself
7x=-23+2 now add the right side
7x=-21 now divide both sides by 7
x=-21/7  
x=-3
7x - 2 = -23          The two is crossed out (-2+2)
    + 2     +2
-------------------

7x  =      -21
---         ------
7             7

x    = -3