Answer:
Subtract 6 from both sides of this equation.
Step-by-step explanation:
For a better understanding of the solution provided here please find the relevant diagram drawn as per given information in the file attached.
As given,
. Also, it is given that
is a straight angle. Therefore,
.
As can be clearly seen from the diagram, if
and
, then:

Therefore, 
Hence Proved.
Answer: FALSE
Step-by-step explanation: