Irene R. answered 04/13/20
BS in Mechanical Engineering and Certified math teacher for 13 years
First, "the difference of x and 4" can be written as : (x - 4)
Then, "twice the difference of x and 4" would be represented as: 2(x - 4)
The reciprocal of 9 is 1 and "greater than" can be represented with this symbol: >
9
Combining all these expressions would give you the following inequality: 2(x - 4) > 1
9
This inequality can be solved using inverse operations as follows:
2(x - 4) > 1
9
1 • 2(x -4) > 1 • 1
2 9 2
x - 4 > 1
18
x - 4 + 4 > 1 + 4
18
x > 4 1
18
This means that any number greater than 4 and 1/18 would be a valid solution.