Answer :
First, add 2 to both sides, and you get z/3 = 14. Then multiply 3 to both sides. 3 x 14 = 42, so we have z = 42. :)
2 - z/3 = 12
Subtract 2 to both sides:
-z/3 = 10
Multiply 3 to both sides:
-z = 30
Multiply -1 to both sides:
z = -30
Subtract 2 to both sides:
-z/3 = 10
Multiply 3 to both sides:
-z = 30
Multiply -1 to both sides:
z = -30