Girardo uses the following steps:

Step 1 Add 4 negative x-tiles to both sides
Step 2 Add 1 negative unit tile to both sides
Step 3 The solution is

Which step could be adjusted so that Gerardo's final step results in a positive x-value?
In step 1, he should have added 4 positive x-tiles to both sides.
In step 1, he should have added 3 negative x-tiles to both sides.
In step 2, he should have added 4 negative unit tiles to both sides.
In step 2, he should have added 1 positive unit tile to both sides.