Respuesta :

Answer:

None

Step-by-step explanation:

0y+3y=3y.

10+3y=13y, 13y is not equal to 3y

y+12=12y, 12y is not equal to 12y

12 is not equal to 3y

y is not equal to 3y

13y-y=12y which is not equal to 3y.

If you made a typo, put it in comment.

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