What's 6yz+2yz-8yz Please help me

To answer this equation follow the steps:
The given is 6yz + 2yz – 8yz.
1.       To answer integers in equations you have to make sure to arrange them and categorize them by their signs or the so-called letters the numbers or values ascribed to. Hence,  6yz + 2yz – 8yz.
2.       Next is using the MDAS rule of operations’ sequence. This involves the step process in answering mix operations in one equation that is from multiplication-division-addition-subtraction.
3.       In this case, the equation has no multiplication and division hence we proceed with the given operations, add and subtract.
4.       First add, it becomes 8yz – 8yz.
5.       Then subtract, 0yz or simply, 0.

Simplify

6yz+2yz−8yz=6yz+2yz+−8yz

Combine Like Terms

=6yz+2yz+−8yz

=(6yz+2yz+−8yz)

= 0.

Where is the diagram