Fill in the blanks :
If the length of a rectangle is increased by 18 units and its breadth is decreased by 9 units then the area of the rectangle is increased by 45 square units. However, if we decrease its length by 9 units and increase breadth by 4 units. Its area is decreased by 180 square units. The length and breadth of the rectangle is _________ units and___________ units respectively .

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