Respuesta :

ayah1
Z - 9 = 27   (the opposite of subtraction is addition, so you have to add 9 to each side)

Z - 9 = 27
  +9    +9 
Z = 27 + 9

Z = 36
 z−9=27

Add 9 to both sides.

z−9+9=27+9

z=36