Question

Z – 9 = 27 a. 3 b. 16 c. 18 d. 36

Answer 1

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

Answer 2

 z−9=27

Add 9 to both sides.

z−9+9=27+9

z=36