Question 964625
{{{A+S=310}}}
{{{5A+3S=1320}}}
Multiply the first equation by {{{-5}}} and add to the second,
{{{-5A-5S+5A+3S=-1550+1320}}}
{{{-2S=-230}}}
{{{S=115}}}
Then,
{{{A+115=310}}}
{{{A=195}}}