Solve the equation

How do you solve this equation?
3 + 6z = 13 + 6z

6z = 10 + 6z {subtracted 3 from both sides}
0 = 10 {subtracted 6z from both sides}
= no solution

If the variable disappears and you get a false statement, then there is no solution. 
If the variable disappears and you get a true statement, then there are infinite solutions.

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