How to Solve If 5 - 2/3z = 1, then z = 6

I need it written in two-column proof form.
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1 Answer

Two-column proof:

Step 2 can be split into two smaller steps: add ⅔z to each side (addition PoE); and subtract 1 from each side (subtraction PoE). Similarly, step 3 can be split into two smaller steps: multiply each side by 3 (multiplication PoE) then divide both sides by 2 (division PoE).

The reason in step 4 is also known as the symmetric property of equality.

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