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3 years ago

13

Half of your baseball card collection got wet and was ruined. You bought 9 cards to replace some that were lost. How many did yo

u begin with if you now have 20?

1 answer:

PtichkaEL [24]3 years ago

6 0

solution:

n/2 + 9 = 20

n/2=20-9

n/2=11

n=22

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