Answer:
6x+2
Step-by-step explanation:
The perimeter is the sum of all of the sides. A rectangle has four sides. You multiply each equation by two, and add the two equations together.
Question number 13 is 18
63
64+53+ (ㅣ) = 180
117 + (ㅣ) = 180
(ㅣ) = 63