Answer: z=3x+1
Explanation:
1. Distribute 6 through the parentheses
18x=6z-6
2. Move the z variable to the left side and x variable to the right
-6z= -6-18x
3. Divide both sides by -6 in order to get z by itself
z=1+3x
4. Reorder the terms using commutative property
z=3x+1