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➷ 9y+y is the same as 10y, because you combine the like terms. y is the same as 1y, so you add 9+1 and that is 10.

Final answer:

9y+y is the same as 10y

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TROLLER

9y + y is 10 y because there is an invisible 1 in front of the y

combine like terms and you get 10y