Respuesta :

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(4x+4y)+(8x+8y)
12x+12y
That should be your answers, you can't add them bc they're not like terms.


4(x+y)+8(x+y)           

Distribute the 4 and 8 to the terms in the parentheses. 

(4x+4y)+(8x+8y)


Combine like terms

12x+12y

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