Question

If the length of a rectangle is decreased by 3 units and breadth increased 4 units ,then the area will increase by 9 sq.units . represent this situation as a linear equation in two variables.

Answer 1

let length be x and breath be y
eq.- (x-3)(b+4)=(A+9)

Answer 2

(l-3)(b+4)=9+lb
lb+4l-3b-12=lb
4l-3b=12