If 8 is added to twice a number and the sum is multiplied by 4, the result is the same as if the number is multiplied by 5 and 11 is added to the product. what is the number

Lorenzo ate 2/5 of his bag of almonds. his 4 friends ate equal shares of the remaining bag of almonds?

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

Could somebody me with this radical simplification?