Two Column Algebraic Proofs

What property of equality is used to solve y - 3 = 6?

What property of equality is used to solve y + 3 = 6?

$$What\ property\ of\ equality\ is\ used\ to\ solve\ \frac{y}{3}=2$$  

$$What\ property\ of\ equality\ is\ used\ to\ solve\ 3y=12$$  

$$What\ property\ is\ used\ to\ simplify\ 2\left(a\ +3\right)$$  

What goes in line 1 of the reasons?

What goes in line 2 of the reasons?

What goes in line 3 of the reasons?

What goes in line 4 of the reasons?

What goes in line 5 of the reasons?

Exit Ticket:

What do we put in the reasons part of proofs