Kari followed the steps below to solve for x in the inequality 6x + 3 > 4x - 21.
Step 1: 6x - 4x + 3 > 4x - 4x -21
Step 2: 2x+ 32-21
2x + 3-3-21-3
Step 4:
2x -24
2x
Step 5:
-24
2
2 2
Step 6:
x>-12
Step 3:
Which property can be used to justify the inequality written in step 2?

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