Answer:
18 years
Explanation:
Given:
Birds bakery has been open 3 times longer than Bridget's bakery.
And Bridget's bakery has been open for 6 years.
So, the Birds bakery open time = 3
Bridget's bakery open time
Birds bakery open time = 3
6
Birds bakery open time = 18 years
Therefore, the Birds bakery has been open for 18 years.