Question 264851
{{{system(7x-4y=-3,2x+5y=8)}}}


What if add the two equations?
{{{7x+2x-4y+5y=-3+8}}}
{{{9x+y=5}}}
{{{y=5-9x}}}


Substitute for y in the first equation.
{{{7x-4(5-9x)=-3}}}
{{{7x-20+36x=-3}}}
{{{43x=17}}}
{{{x=17/43}}}----x is found.


{{{y=5-9(17/43)}}}
{{{y=(5*43-9*17)/43}}}
{{{y=62/43}}}------y is found.