Answer:
9, 18, 27
Step-by-step explanation:
multiples of 9:
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180, 189, 198, ...
63, 126, and 189 are multiples of 9 and 7
63 = 7x
x = 9
126 = 7x
x = 18
189 = 7x
x = 27
x = 9, 18, 27
