Question 838390
1.{{{5x+2y=7}}}
2.{{{ -2x+2y=-14}}}
From eq. 1,
{{{2y=7-5x}}}
Substitute into eq. 2,
{{{-2x+7-5x=-14}}}
{{{-7x=-21}}}
{{{x=3}}}
Then,
{{{2y=7-5(3)}}}
{{{2y=7-15}}}
{{{2y=-8}}}
{{{y=-4}}}