Answers

2016-03-21T14:55:02+05:30
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

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