Answer
$80^{\circ};60^{\circ};40^{\circ}$
Work Step by Step
1. The sum of the angles in the trinagle is 180 degrees-> then construct following equation.
(5x+5)+(4x)+(4x-20)=180
13x-15=180
13x=175
x=15
2. Plug x value in
5(15)+5=80
4(15)=60
4(15)-20=40
