Answer:
XY=18 units
Step-by-step explanation:
Perimeter of the rectangule= 2B-->Base+2H-->Heigth
B=3x
H=2X+2
2·(3X)+2·(2X+2)= 64
6x+4x+4=64
10x=60
X=6--> Now we replace the variable x with numbers
2·(3·6)+2·(14)= 64--> Its correct
B=3X--> 3·6=18--> XY
H=2X+2=12+2=14
