Flat internet program

Under her cell phone plan, Sarah pays a flat cost of $69 per month and $4 per gigabyte. She wants to keep her bill at $83.80 per month. Write and solve an equation that can be used to determine the number of gigabytes of data Sarah can use while staying within her budget.

Correct answer:

x =  3.7 GB

Step-by-step explanation:

69+4 x=83.80  4x=14.8  x=414.8=3.7=3.7 GB  x=1037=3.7  0x  3.7  GB

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