PLEASE SOLVE and get brainliest

d=42

Step-by-step explanation:

Both angles are in a supplementary (straight with 180 degrees) line bisected by an angle, so use the supplementary angle theory

(d+7)+(3d+5)=180

4d+12=180

4d=168

d=42

Solution:

Note that:

Solve the equation to obtain the value of d.

The value of d is 42.

here,

length(l) = x+7

breadth =. x+1

area of rectangle = l * b

i.e. ( x+7) ( x+1)

= x^2+8x+7