Answer:
Problem 1:
a. x=2
b. x=3
c. x=1
Problem 2: 
A multiplication equation to hold the table true:

A division equation to hold the table true:

Explanation:
Given in problem 1:
(a). The equation is 

It holds true for all values of 
 .
.
Let us say 
 ,
,
 
 which is greater than 1.
 which is greater than 1.
(b). The equation is 

It holds true for all values of 
 .
.
Let us say 

 which is less than 1.
 which is less than 1.
(c). The equation is 

It holds true for only 
 .
.
Let us say 
 ,
,
 which is equal to 1.
 which is equal to 1.
Problem 2: 
A multiplication equation to hold the table true:

A division equation to hold the table true:

Therefore these are the values which hold true to the equation in problem 1 and 2.