Thirty-six and twenty eight.
Assuming that you mean to put n instead of 5, this is demonstrating The Identity Property.
The identity property is the property that states that by adding 0 to a number, you don't change the value. For example, 510 + 0 = 510.
Perimeter (P) = 326 cm
Width (w) = 74 cm
Length (l) = ?
We know,
P = 2* (l + w)
326 = 2 (l + 74)
l + 74 = 163
l = 89
Hence, length is 89 cm.
For number 5 you are just multiplying by 4.5
