To find x, we need to make an equation.
Since we know that a straight line is 180 degrees, we can clearly see that 150+5x=180 degrees.
So all we have to do to solve for x is to solve the equation.
150+5x=180
Subtract 150 from both sides to further simplify.
5x=30
Now divide both sides by 5 to isolate x.
X=6
Hope this helps!