The perimeter of the trapezoid is 18 centimeters Write a simplified linear equation in two variables for the perimeter.

Perimeter means the sum of all sides of a figure
The sum of the trapezoid will be the sum of all its sides
=> 5 + 5 + x + y
=> 10 + x + y
Perimeter = 10 + x + y
Where x and y are the variables