Final answer:
Wendy bought 110 packs of flower seeds.
Step-by-step explanation:
Let's assume Wendy bought x packs of flower seeds. Since she bought five fewer vegetable packs than flower packs, she bought x - 5 packs of vegetable seeds.
The cost of x packs of flower seeds will be 1.30x dollars. The cost of x - 5 packs of vegetable seeds will be 1.60(x - 5) dollars.
The total cost of the seeds is 1.30x + 1.60(x - 5) dollars, which is equal to $550.
Solving the equation, we have: 1.30x + 1.60(x - 5) = 550
By simplifying and solving for x, we get x = 110. Therefore, Wendy bought 110 packs of flower seeds.