Answer:
The length of side of original square is: 20 inches
Step-by-step explanation:
Let x be the length of side of original square
Then x+5 will be the side of new square
Th formula for perimeter is:
[tex]P = 4*side[/tex]
As we know the perimeter of the new square we can use the perimeter to find the value of x
[tex]100 = 4 * (x+5)\\100 = 4x+20\\4x = 100-20\\4x = 80\\\frac{4x}{4} = \frac{80}{4}\\x = 20[/tex]
The value of x is 20 inches.
Hence,
The length of side of original square is: 20 inches
