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BillieÍs monthly cell phone bill includes the cost of cell phone service, 15% tax on the cost of the cell phone service, and a $9.25 data fee. BillieÍs monthly cell phone bill totals $61.



What is the cost of the cell phone service before tax is added?

Respuesta :

x - the cost of cell phone service before tax is added

[tex]x+15\%x+9.25=61 \\x+ 0.15x=61-9.25 \\1.15x=51.75 \\x= \frac{51.75}{1.15} \\x= 45[/tex]

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