Question 546404
first angle = x
second angle = 2x
Third angle =x+2x-15==>3x-15

Sum of all angles of triangle = 180 deg

x+2x+3x-15=180

6x-15=180
6x=180+15
6x=195
x=195/6
x=32.5 deg

second angle = 2x==> 65 deg

Third angle = 3x-15==> 3*32.5-15
=97.50-15
=82.5 deg
82.5+32.5+65=