Question 100608
Note: the sum of the angles of any triangle will always equal 180 degrees
Let's call the first angle x
Given: The second angle is three times as large as the first
Second angle = 3x
Given: The thrid angle is 30 degrees more than the first
Third angle = x+30

Now we can create an equation to solve for the 
first angle which we are calling x

(firstangle) + (second angle) + (third angle) = 180
(x) + (3x) + (x+30) = 180
x + 3x + x + 30 = 180
5x + 30 = 180
5x + 30 - 30 = 180 - 30
5x + 0 = 150
5x = 150
5x/5 = 150/5
x = 30


Now that we have found the first angle to be 30 degrees we can
use that to find the other two angles


Angle two = 3x
Angle two = 3(30)
Angle two = 90 degrees


Angle three = x+30
Angle three = 30+30
Angle three = 60 degrees


Now check answers
(firstangle) + (second angle) + (third angle) = 180
30 + 90 + 60 = 180
180 = 180