Answer:
The first one
Scale factor is 7
x = 3
The second one
Scale factor is 9
x = 99
Step-by-step explanation:
The first one
You can find out by dividing 49 by 7 which is 7
to find x = 21 divided by 7 is 3
The second one
You can find out by dividing 162 by 18 which is 9
to find x = 11 multiplied by 9 (since it is "opposite") is 99
