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 of the rectangle be 'x' and its breath be 'y'
We know that the area of a rectangle is = length x breadth
Therefore, According to the question; 
(x-3)(y+4)=(xy)+9
xy+4x-3y-12=xy+9
4x-3y=21
Hope this helps :D

Answer 2

Answer:

Step-by-step explanation:

Let length of the rectangle be 'x' and its breath be 'y'

We know that the area of a rectangle is = length x breadth

Therefore, According to the question;

(x-3)(y+4)=(xy)+9

xy+4x-3y-12=xy+9

4x-3y=21

Hope it help....