The formula of Perimeter of a Rectangle is 2L + 2W
So, P = 2L + 2W
60 = 2(10) + 2(√x-3)
60 = 20 + 2√x-3
-20 + 60 = 2√x-3
40 = 2√x-3
(Divide both sides by 2)
20 = √x-3
(To get rid of the square root, square both sides)
400 = x-3
3 + 400 = x
403 = x
The value of x is 403.
