Answer:
x = 6
Explanation:
the perimeter (P) of a square is calculated as
P = 4s ( s is the side length )
given s = 4x + 1 and P = 100 , then equating gives
4(4x + 1) = 100 ( divide both sides by 4 )
4x + 1 = 25 ( subtract 1 from both sides )
4x = 24 ( divide both sides by 4 )
x = 6