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
Let x be the number of packages Sam bought.
Sam originally had 9x beads.
His mom bought him 63 more beads, so he had 9x + 63 beads.
Now he has a total of 153 beads.
We can express this as the equation: 9x + 63 = 153
Subtracting 63 from both sides, we get 9x = 90.
Dividing both sides by 9, we get x = 10.
Therefore, Sam bought 10 packages. Answer: \boxed{10}.