Question

The perimeter of a triangular Park is 16x + 3. What is the missing length?

Answer 1

`(9x-1)\ units`

Explanation:

we know that

The perimeter of a triangle is the sum of the length of their three sides

see the attached figure to better understand the problem

so

`P=a+b+c`

where

a,b,c are the length sides of the triangle

In this problem we have

`P=(16x+3)\ units`

`a=(2x+5)\ units`

`b=(5x-1)\ units`

substitute and solve for the missing length

`(16x+3)=(2x+5)+(5x-1)+c`

`c=(16x+3)-(2x+5)-(5x-1)`

`c=(9x-1)\ units`