Question 868061
{{{x/4+y/4=-1}}}
1.{{{x+y=-4}}}
.
.
2.{{{x+2y=-13}}}
From eq. 1,
{{{x=-4-y}}}
Substitute into eq. 2,
{{{-4-y+2y=-13}}}
{{{y=-9}}}
Then,
{{{x=-4-y}}}
{{{x=-4-(-9)}}}
{{{x=-4+9}}}
{{{x=5}}}