You can put this solution on YOUR website! 7+6z=8z-13
The object is to find what z equals, and to do this we need to get z by itself.
The first step is to add 13 to both sides;
7+6z+13=8z-13+13
20+6z=8z
Now subtract 6z from both sides;
20+6z-6z=8z-6z
20=2z
Now divide each side by 2; =
10=z
Hope you understand
=)