Mathematics, 24.07.2019 18:00, nevaehroyal0708

It costs patty $90 to have an alarm system installed in her house. she pays a monthly service fee plus tax of 8% of her monthly bill. after 6 months, patty had paid a total of $271.44 for her service fee, taxes, and her initial installation. what is patty's monthly service fee not including taxes?

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It costs patty $90 to have an alarm system installed in her house. she pays a monthly service fee pl...