You would do (2x+60)+6x=180... when you simplify you get 15.
30. is just asking where the two equations graphed intersect each other...
x = -3 and x = 1 for intersections.
The answer is 692.857143
Hope this helps! :)
I don't know what your looking for, so be more specific, but I'm assuming your solving for x, so that's would be
x = -1
