The perimeter of the triangular park shown on the right is 16x-6. what is the missing length? 2x+2 and 5x-4 find the missing length

The perimeter of a Triangle is the sum of three sides ; ie assuming k,l,m be the three sides of a triangle means then k+l+m = perimeter of a triangle.
  here given that a two sides lengths are 2x+ 2 and 5x-4 ;
  and the perimeter length is 16x-6;
   let the unknown side be k;
   therefore k + 2x+2 + 5x-4 = 16x-6;
  resolving k + 7x-2 = 16x-6;
 Ans:- k= 16x-6-7x+2 = 9x-4 ie the unknown length k is 9x-4

(36) (x+6) (-10 or -2) i got this right on (ed)

Step-by-step explanation:

1 Add  to both sides of the equation. The value of  in this equation is 36.

2 Write the left side of the equation as a binomial squared. The left side of the equation becomes (x +6)2.

3 Use the square root property of equality.

4 Isolate the variable: x = -10 or -2