This is your perfect answer
This is a typical algebra problem pretending to be geometry. The two indicated angles are supplementary, adding to 180 degrees, precisely when the lines are parallel.
It's not really indicated, but the 8 and the 2 are in units of degrees.
6x + 8 + 4x + 2 = 180
10x = 170
x = 17 degrees
The value of x = 0 which is none
Annual rent=$10,800
Annual Expenses=$8,400
Rate of income=moneyt
-17 17
----- -(-17) ----
8 ---- -8
8
