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Half of your baseball card collection got wet and was ruined. You bought 9 cards to replace some that were lost. How many did you begin with if you now have 20?

Half of your baseball card collection got wet and was ruined. You bought 9 cards to replace some that were lost. How many did you begin with if you now have 20?
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3 votes
Half of your baseball card collection got wet and was ruined. You bought 9 cards to replace some that were lost. How many did you begin with if you now have 20?

User Keshan De Silva
by
8.5k points

1 Answer

3 votes

solution:

n/2 + 9 = 20

n/2=20-9

n/2=11

n=22

User Aldith
by
8.0k points
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