Question 941118
Multiply the first equation by 5 and the second by 7 and add them together,
{{{15x-35y+14x+35y=65-7}}}
{{{29x=58}}}
{{{x=2}}}
Then,
{{{3(2)-7y=13}}}
{{{6-7y=13}}}
{{{-7y=7}}}
{{{y=-1}}}