I think you're trying to solve for the length and width of a rectangle. If the perimeter of a rectangle is 90 m and its breadth is 10 m less than its length, we can write the equation as 2(x-10) = 90 where x is the length of the rectangle.

Verified answer

Step-by-step explanation:

Given, Perimeter=90m

Breadth is 10m less than its length

Let the lenght be (x)metre

So, breadth=( x-10)m

Perimeter= 2(l+b)

=>90=2[(x)+x-10]

=>90= (2x+2x-20)

=>90= 4x-20

=>90+20=4x

=>110=4x

=>x=110/4

=>x= 27.5m

Length=x

=27.5m

Now, breadth=(x-10)

= 27.5-10

=17.5m

I hope this helps...