Moira solved a problem on the board. What error did Moira make and how can she correct it?
      12x + 10 = 54 - 10x
12x + 10 - 10 = 54 - 10x - 10
          12x = 44 - 10x
12x - 10X = 44 - 10x + 10x
             2x = 44
             X = 22
A- On the left side of the equation, Moira should have subtracted 10x, and on the right side of the equation, Moira should have added 10x.
B- On the left side of the equation, Moira should have added 10x, and on the right side of the equation, Moira should have subtracted 10x.
C- On the left side of the equation, Moira should have added 10x, and on the right side of the equation, Moira should have also added 10x. 
D- On the left side of the equation, Moira should have subtracted 10x, and on the right side of the equation, Moira should have also subtracted 10x. 
Please I really need it