Question 874856
the equalities

{{{drawing(300,300,-10,10,-10,10,graph(300,300,-10,10,-10,10,y=-x,y=-x+3))}}}

In both the lines y> than something so shade the area above the lines

{{{drawing(300,300,-10,10,-10,10,graph(300,300,-10,10,-10,10,y>-x,y>-x+3))}}}