Question 1016389
{5x+9y=-54}
{2x+y=20} 
multiply the bottom by -9
5x+9y= -54
-18x-9y=180
-13x= -234
x=18
y= -16 substituting into second equation
substitute both into first to check
90-144=-54.
{{{graph(300,200,-20,20,-20,20,(-5x/9)-6,-2x+20)}}}