Question

The length of each side of a square increases by 2.5 inches to form a new square with a perimeter of 70 inches. The length of each side of the original square was inches. NextReset

Answer 1

Let x be the original side length of the square

P=2(l+w)
70=2((2.5+x)+(2.5+x))
70=2(5+2x)
70/2 = 5+2x
35-5=2x
30=2x
15=x

Therefore, the original length of the square was 15"

Hope I helped :)

Answer 2

The length of each side of the original square was
`15` inches

Explanation:

Let

x------> the length side of the original square

we know that

The perimeter of a square is equal to

`P=4b`

where

b is the length side of the square

In this problem

`b=(x+2.5)\ in`

`P=70\ in`

substitute

`70=4(x+2.5)`

solve for x

`70=4x+10`

`4x=70-10`

`x=60/4=15\ in`