Alice found a magic penny machine. The machine subtracts $5$ pennies, then doubles all of the pennies left, then subtracts $30$ pennies, and then adds $26$ pennies. Alice puts in $15$ pennies. How many pennies will she get out of the machine?

Note: Sometimes, this results in negative pennies, but that's OK because this is all magic.

Question

30-09-2022
Mathematics

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Alice found a magic penny machine. The machine subtracts $5$ pennies, then doubles all of the pennies left, then subtracts $30$ pennies, and then adds $26$ pennies. Alice puts in $15$ pennies. How many pennies will she get out of the machine?

Note: Sometimes, this results in negative pennies, but that's OK because this is all magic.

Sagot :

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