paranoidbih
09.07.2019 •
Mathematics
Half of your baseball card collection got wet and was ruined. you bought 19 cards to replace some that were lost. how many did you begin with if you now have 45
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Ответ:
x=52
Explanation:
1/2x +19=45
-19 -19
0
1/2×
= 26
1/2
1/2×26=13
x=13
Ответ: