Question 911764
Supplementary angles are angles that add up to 180 degrees.  In order to solve for x, we need to set the question up as an equation.  So,


x + 4x + 5 = 180


Next, combine the x and the 4x:


5x + 5 = 180


Next, we need to isolate the x.  To do this, we first subtract 5 from both sides of the equation:

5x + 5 - 5 = 180 - 5


5x = 175


Finally, divide both sides of the equation by 5:


{{{5x/5 = 175/5}}}


x = 35


So, the value of x is 35 degrees