If the degree measure of an angle is 40° less than 3 times the degree measure of its supplementary angle, what is the degree measure of the angle?
A.
50°
B.
55°
C.
125°
D.
130°

Question

If the degree measure of an angle is 40° less than 3 times the degree measure of its supplementary angle, what is the degree measure of the angle?
A.
50°
B.
55°
C.
125°
D.
130°

anonymous · Answer

Two angles are supplementary if the sum of their angles is 180 degrees.

Call the angle x.
Its supplement is 180 - x.

Now write an equation!

anonymous · Answer

i still cant figure it out

directrix · Answer

@Easyaspi314

Let x be the angle

Then, its supplement is: 180 - x 

--> an angle is 40° less than 3 times its supplement

Those words translate to the following equation:

x  =  3*(180-x )- 40

Solve the equation for x to get the angle.