One smartphone plan costs $52 per month for talk and messaging and $8 per gigabyte of data used each month. A second smartphone plan costs $82 per month for talk and messaging and $3 per gigabyte of data used each month. Let
c represent the total cost in dollars and d represent the amount of data used in gigabytes.
+
Ic=52 + 8d
The system of equations
can be used to represent this situation,
C= 82 + 3d
How many gigabytes would have to be used for the plans to cost the same? What would that cost be?
Both plans would cost s
if
gigabytes of data are used.