Question 301568
let the first angle be x 

the second angle will be 2x

the third abgle = 4x+5

THE SUM OF ALL THE ANGLES OF A TRIANGLE = 180 DEG

x+2x+4x+5=180

7x+5=180
7x= 180-5
x=175/7

x= 25 the first angle

second angle = 2x = 50 deg

theird angle = 4x +5 = 4*25 +5=105 deg