Here is my first one, I am close to the solution, If I had a graphing calculator I would have the solution


This is what I have so far:
- [ 6z - ( 9z + 10 ) ] = 10 + ( 2z + 6 )
- [ 6z + 9z - 10 ] = 10 + ( 2z + 6 )
-6z - 9z + 10 = 10 + ( 2z + 6 )
-15z = 6 + 2z
-17z = 6
z = 6/-17