Plz help me i need to pass I've been trying this lesson all day and I can't figure this out

9514 1404 393

  see the attachment

Step-by-step explanation:

The problem statement tells you where you're starting (6·0 = 0) and where you want to end up (6·-10 = -60). These equations are the first and last steps in the right-hand column.

You should be able to recognize the step that was performed to get from one line to the next. The description of that is what goes in the left-hand column.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this