Answer: x > 19/4
First we want to rearrange the terms:
6 - 4x < -13
-4x + 6 < -13
Now we want to subtract 6 on both sides:
-4x + 6 < -13
-4x + 6 - 6 < -13 - 6
Now, when we subtract the numbers, we simplify:
-4x < -19
We we want to divide both sides by the same factor, and flip the relation because the factor is negative:
-4x / -4 < -19 / -4
Now we simplify:
x > 19/4