Collect like terms by changing the sign when you move the term to the other side.
z = 10 -6 (change sign)
z = 4
Note: Changing the sign is a shortcut precise method is to add/subtract a term on both sides to cancel out the term you don't want
Method: 6 - 6 +z = 10 -6
(subtract -6 to cancel out the 6)
Therfore: z = 10 -6. ---> z= 4
