Question 1160781
Solution.
Since the condition given is x+(x+50)+(180-3x) = 180
x+(x+50)+(180-3x) = 180
Remove parentheses
x+x+50+180-3x = 180
Collect the like terms
-x+50+180 = 180
Add the numbers
-x+230 = 180
Move constant to the right side of the equation and change its sign
-x = 180-230
Calculate the difference 
-x = -50
Multiply both sides of the equation by -1
-x*(-1) = -50*(-1)
Any expression multiplied by -1 equals its opposite
x = -50*(-1)
Any expression multiplied by -1 equals its opposite
x = 50
x+50 
Use substitution
50+50 = 100
180-3x
Use substitution
180-(3*50)
180-150 = 30
So the angels of the triangle is 50 degree, 100 degree, and 30 degree.
Check-----
x+(x+50)+(180-3x) = 180
Hope it's helpful for you!