Finally had some time to look at this one over. Maybe I should have taken a bit more time to think

Let's start over

A's speed: 1/(x+2)

B's speed: 1/x

3*[1/(x+2) + 1/x] = 5/4

By backsolving, we actually find that x=4

3*[1/(4+2) + 1/4] = 5/4

3*[1/6 + 1/4] = 5/4

3*[(2+3)/12] = 5/4

3 * 5/12 = 5/4

15/12 = 5/4

5/4 = 5/4

Bingo! We know that x=4

However, we are looking for A's speed. A's speed is 1/(x+2) = 1/6

This means that A takes 6 days to do 1 widget

For 2 widgets, we have 6*2 = 12 days!

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Best Regards,

Paul