Find two supplementary angels such that the measure of the first angle is 38° less than three times the measure of the second


angle 1+ angle 2=180    supplementary angles add up to 180

angle 2=x     assign angle a variable

angle 1= 3x-38      find equation for first angle

3x+x-38=180      set both angles added together equal to 180

4x-38=180        combine like terms

4x=218        add 38 to both sides

x=54.5        divide by 4

angle 2= 54.5

angle 2= (3x54.5)-38   plug back in and solve

angle 1= 125.5           


3x-38
x-2nd angle

3x-38+x=180
4x-38=180
4x=218
x=54.5

First angle 
3(54.5)-38
163.5-38
125.5


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