Question 350501
1.{{{0.5x + 1.5y = 5}}}
2.{{{x + y = -10}}}
Multiply eq. 1 by (-2) and add to eq. 2,
{{{-x-3y+x+y=-10-10}}}
{{{-2y=-20}}}
{{{highlight(y=10)}}}
Then from eq. 1,
{{{x+10=-10}}}
{{{highlight(x=-20)}}}