LCM (x 45)=180 and GCF (x and 45)=9find x

(LCM)(GCF) = 180*9 = 1620

one of the numbers is 45 , the other is 1620/45 = 36

check:
36 = 2*2*3*3
45 = 3*3*5

GCF = 3*3 = 9
LCM = 2*2*3*3*5 = 180