Question 942706
supplementary angles add up to {{{180}}}

if angle {{{x}}} that is {{{30}}} degrees less than {{{twice}}} its supplement, then we have
 
{{{x = 2(180-x)-30}}}

solve for {{{x}}}:

{{{x = 2*180-2x -30
{{{x = 360 - 2x -30}}}
{{{x = 330 -2x}}}
{{{3x = 330}}}
{{{x = 110}}} degrees (angle #1)

The supplement would be {{{(180-x)}}} or {{{(180-110)=70}}}.... Angle #2 is {{{70}}} degrees.