Answer:
you combine all the x terms 2x, x, 3x, and 6x to get 10x since they are all positive (or just don't have a subtraction sign next to them)
Now combine the regular numbers with no variable next to them (positive 5 and 2 with NEGATIVE 17) to get -10.
Now your equation is this
10x + -10
However, we need to simplify it by tuning -10 into - 10 to get our new expression
10x - 10
This is our expression to solve for the perimeter of this shape. Sorry if its wrong I haven't done this in a while.