In a triangle the measure of the first angle is twice the measure of the second angle. the measure of the third angle is 8 degree less than the measure of second angle what is the measure of each angle

Let's call the missing angles Q, R, and S. We know that Q = 2R and S = R - 8 and we also know that Q + R + S = 180. So that really just means that              180 = 4R - 8  Add 8 on both sides of the equal sign
188 = 4R So we divide on both sides of the equal sign by 4
47 = R And that means that Q = 2 * 47 So Q = 94 and S = 47 - 8 So S = 39
39 + 94 + 47 = 180
The missing angles are 39 degrees 94 degrees and 47 degrees.

We’re gonna need a picture to refer to in order to figure it out. try reposting your question with the picture included.