Answer:
x = 1
Step-by-step explanation:
The perimeter (P) is the sum of the 3 sides
Given P = 20 , sum the 3 sides and equate to 20
4x - 2 + 4x + 5 + 4x + 5 = 20 , that is
12x + 8 = 20 ( subtract 8 from both sides )
12x = 12 ( divide both sides by 12 )
x = 1
