Question 946855
{{{A+S=180}}}
{{{S=39+A/2}}}
Substituting,
{{{A+39+A/2=180}}}
{{{(3/2)A=141}}}
{{{A=(2/3)141}}}
{{{A=94}}}
So then,
{{{94+S=180}}}
{{{S=86}}}