and 
use the second expression to calculate the left-hand side of the first equation:

Add 10 to both sides if this equation to get

and divide both sides by 2

this proves that x = 17, give the two initial equations
Hi, Ptaverez1! :)
First we must length of an individual square; This can be achieved by using the formula for the area of a square:


Lets input the information we already know:

Take square root.


The length of an individual square tile is
6.5 ft.
Since they're are 9 tiles and the porch in a square, I can conclude that the measurements for the porch are 3 tiles by 3 tiles (as 3*3=9; using the formula for the area of a square.)
Since the length of the porch is 3 tiles, we must multiply the individual tiles piece length by 3:


The formula for the perimeter of a square is:


Lets input the information we know:


The perimeter of the porch is 78 feet²
Hope this helps.
-Benjamin
Nope.
Natural numbers consist of 1, 2, 3, 4 and so on. Integers, on the other hand, include 0 and the opposites of natural numbers (negative values). Therefore not all integers are natural numbers. Some of them are though.
If each is similar, then 6 times (5) = 30
therefore 8 times (5) = 6X - 8
40 = 6X - 8
add 8 to both sides 48 = 6X
divide by 6 8 = X
93 - 3 =90
93 - 10 = 83
93 - 3/10 = 98 and 7/10
93 - 30 = 63