Question 214356
Supplementary angles sum to 180
Let one angle be x. The then other one is {{{180-x}}}
You are told {{{x = (1/4)(180-x) + 30}}}
{{{x = 45 - x/4 + 30}}}
{{{5x/4 = 75}}}
{{{x = 4*75/5}}}
{{{x = 60}}}
Check your answer. Is 60 = (180-60)/4  + 30???