Answer:
x=72
Step-by-step explanation:
Multiply both sides by 9 (x=8 times 9)
x
- = 8
9
Let x = 72
72
_ =8
9
8=8
Therefore x =72
1/5, 3/5, 7/8 is from least to greatest.
Answer:

Step-by-step explanation:
Let the greatest common factor of
such that
and they are not all equal to zero,
is the common divisor of
and
. Therefore,
and 
You can write


The greatest common factor of
is given as

and

This happens because
is upper bounded because if
then 
for all
. Therefore, the set
has the greatest elements.
Taking
such that 
You can note that
and 
Therefore, the greatest common factor is 
Note: 