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Answer:

8x+8

Step-by-step explanation:

x+4+3x+x+4+3x

8x+8

hope it helps :)

Answer:

Should be 8x+8.

Step-by-step explanation:

(non simplified) 3x+3x+(x+4)+(x+4)

6x+(2x+8)

8x+8

Hope this could help