Question

Three angles of a triangle are x-30, x-45,x+15, find value x

Answer 1

See the attached file

Answer 2

We know that sum of angles of a triangle is 180. therefore.....
(x-30)+(x-45)+(x+15)=180
3x-15-45=180
3x-60=180
3x=180+60
3x=240
x=240/3
x=80