Question

HELP!!!!! PICTURE ADDED

Answer 1

the perimeter of a triangle equals the summation of it sides ,, right??

Answer 2

so all what will you do is that :
(5x-7) + (4x-4) + (13-x ) = 38
and you can calculate the value of x :D

Answer 3

I dont know how to do that

Answer 4

nvm got it

Answer 5

you will add like terms
(5x+4x-x) + (-7-4+13) = 38
8x + 2 = 38
8x = 38 - 2
8x =36
x = 36/8
x = 4.5
you got it now??