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)
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Let x be the number of packages Sam bought.
Sam originally had 9x beads.
After his mom bought him more beads, he had 9x + 63 beads.
Therefore, 9x + 63 = 153
Subtracting 63 from both sides of the equation, we get 9x = 90
Dividing both sides of the equation by 9, we get x = 10.
So, Sam bought 10 packages. Answer: \boxed{10}.