Given:
The inequality is

To find:
The step that is missing in the resolution of the given inequality.
Solution:
Step 1: The equation provided.

Step 2: Subtract 8x from both sides.


Step 3: Add 4 to both sides.


Step 4: Divide every side by -2, reversing the sign of the inequality because we are dividing by a negative number.


Consequently, the missing step is
.
Gabe mowed 5 lawns and made $150.