To undo a subtraction problem what do you have to do?
a) you add the same number
b) you subtract the same number
c) you divide the same number
d) you multiply the same number

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick