Question 1063636
{{{A+S=180}}}
{{{A+C=90}}}
Subtracting,
{{{A+S-A-C=180-90}}}
{{{S-C=90}}}
and
{{{S=3C-38}}}
Substituting,
{{{3C-38-C=90}}}
{{{2C=128}}}
{{{C=64}}}
So,
{{{A+64=90}}}
{{{A=26}}}