Question 1152013
let one angle be {{{x}}}° 
adjacent angle is {{{2x-15}}}°

sum:
{{{x + 2x-15 = 180}}}°

{{{3x = 180+15}}}°

{{{3x = 195}}}°

{{{x = 65}}}°-> one angle

{{{2x-15}}}°=>{{{2*65-15}}}°=>{{{115}}}°->the angle next to it