Expand and simplify.

2(3+4y+7)

I got 8y + 20 but I don't think this is the right answer.

2 ( 3 + 4 y + 7 ) =

2 * 3 + 2 * 4 y + 2 * 7 =

6 + 8 y + 14 = 8 y + 20