Edlingastelum09go Edlingastelum09go Mathematics Answered . When the length of a side of a square is increased by 5, the perimeter of the new square is 60. Which equation can be used to find the length of the side of the original square? A. 4(x + 5) = 60 B. 4(x-5) = 60 C. 4x + 5 = 60 D. 4x5 = 60