Question 20154
A square platform has a perimeter which is 10 times the length of a side decreased by 12. Find the length of a side.


The perimeter of a square can be viewed as 4s. (s=side)
4s=10s-12
Subtract 10s from both sides...
-6s=-12
Divide by -6...
s=2
Now you can put your answer back into the equation to check it.
4(2)=10(2)-12
8=20-12
8=8
This works, so your answer is 2.
-weeping