Sam is buying packages with 9 beads each. His mom bought him 63 more beads. Now, he has 153 beads. How many packages did he buy? Use algebra to determine the answer.(1 point)
Let x be the number of packages Sam initially bought.
Sam initially had 9x beads.
After his mom bought him more beads, he had 9x + 63 beads.
Setting up the equation 9x + 63 = 153, we can solve for x.
Subtracting 63 from both sides, we get 9x = 90.
Dividing both sides by 9, we get x = 10.
Therefore, Sam initially bought 10 packages. Answer: \boxed{10}.