Answer:
Step 2: the addition property of equality.
Step 3: simplification.
Step 4: the division property of equality.
Step 5: simplification.
Step-by-step explanation:
In step 2, isolating 6x by adding 9 to both sides of the equation is justified by the addition property of equality.
In step 3, adding like terms on each side of the equation is simplification.
In step 4, dividing both sides of the equation by 6 to isolate x is justified by the division property of equality.
In step 5, the solution is obtained through simplification.
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