Hay i m taking econ this year to when I'm stuck i watch these they really help
https://www.youtube.com/playlist?list=PL8dPuuaLjXtPNZwz5_o_5uirJ8gQXnhEO
Coefficients are the numbers in a equation variables are the letter
Two parallel lines never intersect, therefore they will never have a solution.
One line could be x=6 and the other could be x=2
Hope this helps :)
I cant see it well try to get a better pic and i can help you