Answer:
6x^2+10x-6=0
Step-by-step explanation:
First, you need to add all like terms:
6x^2+8x-6=-2x
Now move the -2x to the other side:
6x^2+10x-6=0
Answer:
12
Step-by-step explanation:
The average is calculated as
average =
=
=
= 12
If you want to solve this i suggest rather dividing or multiplying.
The compatible number is 7 (seven)