Final answer:
Victor needs 7 seed packets to have a total of 23 plants in his backyard.
Step-by-step explanation:
To find the number of seed packets Victor needs to have a total of 23 plants in his backyard, we can set up an equation.
Let x represent the number of seed packets Victor needs.
Using the information given, Victor already has 2 plants in his backyard, and he can grow 3 plants with every seed packet. So, the equation becomes:
2 + 3x = 23
Subtracting 2 from both sides:
3x = 21
Dividing both sides by 3:
x = 7
Therefore, Victor needs 7 seed packets to have a total of 23 plants in his backyard.