26
3<span>⟌78
-6
-------
18
-18
-------
0
</span>
R=I+6 S=4R I
I+(I+6)+4(I+6)=126
Basic algebra (I dont know how to show it) leaves you with: 6I = 90, divide both sides by 6 and I=15
Answer:

Step-by-step explanation:

= -
× -
← multiply numerators/ denominators
= 
=
Boom there you go,hope it helps
Answer:
Let P = Perimeter of square
Let l = Length of the sides of the square
P = 4l