Perimeter of a rectangle can be calculated as twice the sum of its length and with.
So, we can write:
Perimeter = 2(Length + Width)
Length is given to be x inches and Width is given to be 10 inches. Using these values, we can write the perimeter as:
Perimeter = 2(x + 10) = 2x + 20 inches
Thus, the perimeter of the rectangle would be 2x + 20 inches or simply 2(x + 10) inches.