Answer:
x = 25, The angles of the triangle are 60*, 45*, and 75*.
Step-by-step explanation:
The sum of the angle measure is 180 so we can form this equation:
60 + (x + 20) + 3x = 180
Now isolate the variable to find x.
(x + 20) + 3x = 120
4x + 20 = 120
4x = 100
x = 25
Now solve for the angles of the triangle.
3(25) = 75
(25 + 20) = 45
