EXPLANATION
Let's see the facts:
Flat cost= $56/month
Variable cost= $4/gigabyte
Total bill = $70
Let x be the number of consumed gigabytes, the inequality is:
[INEQUALITY] 56 + 4x < 70
Now, solving for x:
Subtracting -56 to both sides:
4x < 70 - 56
Adding like terms:
4x < 14
Dividing both sides by 4:
x < 14/4
Simplifying:
x < 3.5
So, the answer is x<