Question 1167379
Multiply first equation by  {{{1/2}}}.


{{{system(-3x-y=5,3x+2y=8)}}}
Simpler system, and at least allows for eliminating x to quickly solve for y.


Either you want to use Substitution Method, or Elimination Method.

If you did not learn Elimination Method, then:



{{{-3x-y=5}}}
{{{-y=5+3x}}}
{{{y=-3x-5}}}
Sustitute into other equation.
{{{3x+2(-3x-5)=8}}}
{{{3x-6x-10=8}}}
{{{-3x-10=8}}}
{{{-3x=18}}}
{{{highlight(x=-6)}}}
Substitute this into either equation.
{{{y=-3x-5}}}
{{{y=-3*(-6)-5}}}
{{{y=18-5}}}
{{{highlight(y=13)}}}