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Each month Maria pays a 30$ cell phone bill from her bank account. At the end of the year. what is the change in the account of money in Maria's account because of cell phone bill?PLEASE HELP I DON'T UNDERSTAND

Sagot :

Each month Maria pays a 30$ cell phone bill from her bank account. At the end of the year. what is the change in the account of money in Maria's account because of cell phone bill?

Let

x ------> the original amount in her bank account

we know that

Each month Maria pays a 30$ cell phone bill

In a year there are 12 months

so

At the end of the year, the amount in her account is equal to

x-12*30

x-$360

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