From the inequality and nature of x, and y, we get the given diagram:
We need to find the area of the quadrilateral ABDE= area of rectangle ABCD+ area of triangle CDE⇒ Area of ABCD=(7−3)⋆5=20 units, and the area of triangle CDE=(
1
2
)⋆10⋆5=25 units. Hence, the area of the quadrilateral ABDE=(20+25)=45 units.