Hey there! :D
Supplementary= 180
180= 3x+10+x
x= the first angle I put 3x because it is 3 times the other one, and 10 more.
Now, solve.
180= 4x+10
Subtract 10.
170=4x
Divide both sides by 4.
x=42.5
That is the measure of the first angle.
42.5*3= 127.5
Now, add 10.
137.5 is the second angle.
We can add them to make sure.
137.5+42.5= 180 <== this works
I hope this helps!
~kaikers
