Answer:
I do not see the choices. There could be more than one right answer
6x + 3y
Explanation:
3x + 3(x+y)
3x + 3x + 3y
=3x + (3)(x) + (3)(y)
=3x + 3x + 3y
=3x + 3x +3y
=(3x + 3x) + (3y)
=6x + 3y
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