Question

y>2x
y>x+3

Answer 1

first for y>2x

Answer 2

u can see y=2x divides the plane into two parts. now choose two point, one on each side of the line, for example (1,-1) y (-1,1) and replace this in y>2x

Answer 3

for (1,-1) -1>2(1) -1>2 false
for (-1,1) 1>2(-1) 1>-2 true
then the solution of y>2x is