Step-by-step explanation:
a.
if x=-1 then,
y=2*(-1)-1
y=-2-1
y=-3
if y=-1 then,
-1=2x-1
-2x=-1+1
-2x=0
x=0
if x=1 then,
y=2*1-1
y=2-1
y=1
if y=3 then,
3=2x-1
-2x=-1-3
-2x=-4
-2/-2x=-4/-2
x=2
b.
if x=0 then,
0+y=-2
y=-2
if x=1 then,
y+1=-2
y=-1-1
y=-3
if x=2 then,
y+2=-2
y=-2-2
y=-4
if x=3 then,
y+3=-2
y=-2-3
y=-5
